Cordova Health Plugin

A plugin that abstracts fitness and health repositories like Apple HealthKit or Google Health Connect.

This work is based on cordova healthkit plugin. This plugin is kept up to date and requires a recent version of cordova (12 and on) as well as recent iOS and Android SDKs. For bugs and improvements use the issues tracker. For general question or small issue, please use the gitter channel.

Warning about the new version (3+)

This is a complete rewrite of the Android version of the plugin to support the new HealthConnect API. Google Fit APIs are deprecated and will be made obsolete in 2024.

Google Fit is no longer supported by this plugin. If, for any masochistic reason, you want to use Google Fit, you need to use an older version of this pluign (2.1.1).

Please be remindful that THIS IS STILL A WORK-IN-PROGRESS. While all functionalities listed here are implemented and working, there are several data types that were supported in older versions and are not supported in this version YET. If you need support for a given data type, please check if it is already implemented in iOS, then either add support in Java and send a pull request, or add an issue and I will prioritize it.

Installation

In Cordova:

cordova plugin add cordova-plugin-health --variable HEALTH_READ_PERMISSION='App needs read access' --variable HEALTH_WRITE_PERMISSION='App needs write access'

HEALTH_READ_PERMISSION and HEALTH_WRITE_PERMISSION are shown when the app tries to grant access to data in HealthKit.

iOS requirements

• Make sure your app id has the 'HealthKit' entitlement when this plugin is installed (see iOS dev center).
• Also, make sure your app and App Store description comply with the Apple review guidelines.
• There are two keys to be added to the info.plist file: NSHealthShareUsageDescription and NSHealthUpdateUsageDescription. These are assigned with a default string by the plugin, but you may want to contextualise them for your app.

Android requirements

• HealthConnect is made standard on (Google versions of) Android from version 14 (API level 34). On older versions of Android, the user has to install the Health Connect app from the Play Store. Be aware that the Health Connect app is only compatible with Android 9 (API level 28) or higher see this.
• Health Connect SDK used here (v 1.1.0-alpha10) needs to target Android 15 (API level 35) and the minimum SDK level should be 26. Also Gradle and Android Gradle Plugin (AGP) should be recent, versions 8.7 for Gradle and 8.6.0 for the Android Plugin work. As the lateste version of cordova Android usually use older versions, it is necessary to configure those more updated versions in to the config.xml of your cordova app project. For example:

<platform name="android">
  ...
  <preference name="android-minSdkVersion" value="26" />
  <preference name="android-targetSdkVersion" value="35" />
  <preference name="GradleVersion" value="8.7" />
  <preference name="AndroidGradlePluginVersion" value="8.6.0" />
  ...
<platform>

Additionally, there are issues with some kotlin depenendencies which are fixed automatically by the plugin in src/android/build-extras.gradle. All these hacks will hopefully be removed with future versions of the cordova-android platform.

• Download a recent version of gradle (8.7 or later).
• If you use Android Studio, download at least version Hedgehog.
• Be aware that Health Connect requires the user to have screen lock enabled with a PIN, pattern, or password.
• When publishing the app, you need to comply to these requests from Google.
• This plugin uses AndroidX. You may need to activate AndroidX in the Android platform and make sure all other plugins you use are AndroidX compatible.

Permissions in AndroidManifest.xml

Health Connect requires that each data type accessed is listed as permission in the AndroidManifest.xml file. This plugin will NOT ADD PERMISSIONS for the data types that you need, the list is too long to add them all and having all permissions listed may be problematic when submitting to the Play Store. You need to modify the AndroidManifest.xml file and add the needed permissions manually. See this to understand which permissions you need, depending on the data types that you actually want to access. The best way to add permissions is to include them in the config.xml file of your cordova project so that the build process is reproducible and the permissions are not lost when removing and re-adding the Android platform. Example:

<platform name="android">
    ...
    <config-file target="AndroidManifest.xml" parent="/*" xmlns:android="http://schemas.android.com/apk/res/android">
        <uses-permission android:name="android.permission.health.READ_STEPS" />
        <uses-permission android:name="android.permission.health.WRITE_STEPS" />
        <uses-permission android:name="android.permission.health.READ_TOTAL_CALORIES_BURNED" />
        ...
    </config-file>
    ...
</platform>

Mandatory Privacy Policy on Android

A Privacy Policy must be present on Android in order for the app to be approved for distribution. The plugin includes a simple webview, with no JS activated, to show the Privacy Policy when requested. The Privacy Policy must be formatted as an HTML page (no JS) and placed as a file with name: privacypolicy.html under the www folder of the project (in other words, the webview loads the following URL: file:///android_asset/www/privacypolicy.html). It is possible to change that URL by changing the value inside the file platforms/android/app/src/main/res/values/CordovaPluginHealthStrings.xml. WARNING: I suspect that this file may get reset sometimes to its original value. There should be a way to modify it from config.xml using edit-config but I was not able to make it work. Help is welcome.

Manual setup in Capacitor (Ionic)

Capacitor does not automatically include all changes to AndroidManifest.xml or gradle files from plugin.xml. This is a short guide to do it manually. Based on plugin v3.1.0 and @capacitor/android v5.5.1, future versions may be different.

1. install the plugin from npm (npm install cordova-plugin-health), DO NOT USE awesome-codova-plugin, it hasn't been updated yet. Build the app as you would normally do (npm run build), sync it with the android code (npx cap sync) and get the Android project in Android Studio (npx cap open android) or another editor.
2. add the Privacy Policy activity to AndroidManifest.xml, inside <application></application>:

      <!-- For supported versions through Android 13, create an activity to show the rationale
       of Health Connect permissions once users click the privacy policy link. -->
      <activity
        android:name="org.apache.cordova.health.PermissionsRationaleActivity"
        android:exported="true">
        <intent-filter>
          <action android:name="androidx.health.ACTION_SHOW_PERMISSIONS_RATIONALE" />
        </intent-filter>
      </activity>

      <!-- For versions starting Android 14, create an activity alias to show the rationale
       of Health Connect permissions once users click the privacy policy link. -->
      <activity-alias
        android:name="ViewPermissionUsageActivity"
        android:exported="true"
        android:targetActivity="org.apache.cordova.health.PermissionsRationaleActivity"
        android:permission="android.permission.START_VIEW_PERMISSION_USAGE">
        <intent-filter>
          <action android:name="android.intent.action.VIEW_PERMISSION_USAGE" />
          <category android:name="android.intent.category.HEALTH_PERMISSIONS" />
        </intent-filter>
      </activity-alias>

3. add the possibility to query for the presence of Health Connect to AndroidManifest.xml, inside the root tag:

      <!-- Check if Health Connect is installed -->
      <queries>
        <package android:name="com.google.android.apps.healthdata" />
      </queries>

4. add permissions to AndroidManifest.xml , inside the root tag. This depends on the actual data types you want to access. See this for a list.

      <uses-permission android:name="android.permission.health.READ_STEPS" />
      <uses-permission android:name="android.permission.health.WRITE_STEPS" />

5. modify the main build.gradle file and update:

classpath 'com.android.tools.build:gradle:8.6.0'

6. modify the variables.gradle file, particularly:

minSdkVersion = 26
targetSdkVersion = 35
compileSdkVersion = 35

Supported data types

These are currently supported in both Android and iOS. Please notice that older versions of this plugin included more data types, but with Google Fit, not Health Connect. Support for previously supported data types has not been removed on iOS, it's simply not listed here. The plan is to complete the porting of all previously supported data types from Google Fit to Health Connect, just be patient, or give us a hand.

Data type	Unit	HealthKit equivalent	Health Connect equivalent
gender		HKCharacteristicTypeIdentifierBiologicalSex	NA
date_of_birth		HKCharacteristicTypeIdentifierDateOfBirth	NA
weight	kg	HKQuantityTypeIdentifierBodyMass	Weight
height	m	HKQuantityTypeIdentifierHeight	HeightRecord
bmi	count	HKQuantityTypeIdentifierBodyMassIndex	NA
fat_percentage	%	HKQuantityTypeIdentifierBodyFatPercentage	BodyFatRecord
steps	count	HKQuantityTypeIdentifierStepCount	StepsRecord
distance	m	HKQuantityTypeIdentifierDistanceWalkingRunning + HKQuantityTypeIdentifierDistanceCycling	DistanceRecord
activity	activityType	HKWorkoutTypeIdentifier	ExerciseSessionRecord
appleExerciseTime	min	HKQuantityTypeIdentifierAppleExerciseTime	NA
sleep	sleep	HKCategoryTypeIdentifierSleepAnalysis	SleepSessionRecord
calories.active	kcal	HKQuantityTypeIdentifierActiveEnergyBurned	ActiveCaloriesBurnedRecord
calories.basal	kcal	HKQuantityTypeIdentifierBasalEnergyBurned	BasalMetabolicRateRecord * time window
calories	kcal	HKQuantityTypeIdentifierActiveEnergyBurned + HKQuantityTypeIdentifierBasalEnergyBurned	TotalCaloriesBurnedRecord
heart_rate	bpm	HKQuantityTypeIdentifierHeartRate	HeartRateRecord
workout_route	bpm	HKWorkoutRouteType	NA
blood_glucose	mmol/L	HKQuantityTypeIdentifierBloodGlucose	BloodGlucoseRecord
blood_pressure	mmHg	HKCorrelationTypeIdentifierBloodPressure	BloodPressureRecord
mindfulness	sec	HKCategoryTypeIdentifierMindfulSession	NA
UVexposure	count	HKQuantityTypeIdentifierUVExposure	NA
nutrition	nutrition	HKCorrelationTypeIdentifierFood	NutritionRecord
nutrition.carbs.total	g	HKQuantityTypeIdentifierDietaryCarbohydrates	NutritionRecord, TOTAL_CARBOHYDRATE_TOTAL
nutrition.fat.total	g	HKQuantityTypeIdentifierDietaryFatTotal	NutritionRecord, TOTAL_FAT_TOTAL
nutrition.protein	g	HKQuantityTypeIdentifierDietaryProtein	NutritionRecord, PROTEIN_TOTAL
nutrition.calories	kcal	HKQuantityTypeIdentifierDietaryEnergyConsumed	NutritionRecord, ENERGY_TOTAL
nutrition.water	ml	HKQuantityTypeIdentifierDietaryWater	HydrationRecord, TYPE_HYDRATION
nutrition.sugar	g	HKQuantityTypeIdentifierDietarySugar	NutritionRecord, NUTRIENT_SUGAR

Note: units of measurement are fixed!

Returned objects contain a set of fixed fields:

• startDate: a date indicating when the data point starts
• endDate: a date indicating when the data point ends
• unit: the unit of measurement, as a string
• value: the actual value
• sourceBundleId: the identifier of the app that produced the data
• sourceName: (only on iOS) the name of the app that produced the data (as it appears to the user)
• sourceDevice: (only on Android) the device where the data came from manufacturer and model
• entryMethod: (only on Android) method of insertion, can be "actively_recorded", "automatically_recorded", "manual_entry" or "unknown"
• id: the unique identifier of that measurement

Example values:

Data type	Value
gender	"male" Notes: only available on iOS
date_of_birth	{ day: 3, month: 12, year: 1978 } Notes: currently only available on iOS
weight	83.3
height	1.72
bmi	25 Notes: only available on iOS
fat_percentage	0.312
steps	34
distance	101.2
activity	"walking" Notes: recognized activities and their mappings in Health Connect / HealthKit can be found here. Additional calories (in kcal) and distance (in m) can be added if the query has the includeCalories and/or includeDistance flags set. Warning If you want to fetch calories and/or distance, permission to access those quantities should be requested.
appleExerciseTime	24 Notes: only available on iOS
sleep	'sleep.light' Notes: recognized sleep stages and their mappings in HealthConnect / HealthKit can be found here in Android it is also possible to retrieve an entire session, in which case the value is an array of sleep stages [ { startDate: Date, endDate: Date, stage: 'sleep.light' }, ...]
calories.X	245.3
heart_rate	66
blood_glucose	{ glucose: 5.5, meal: 'breakfast', sleep: 'fully_awake', source: 'capillary_blood' } Notes: to convert to mg/dL, multiply by 18.01559). meal can be: 'before_' / 'after_' / 'fasting_' (Android only) + 'meal' (iOS only) / 'breakfast' / 'dinner' / 'lunch' / 'snack' / 'unknown'. sleep can be (iOS only): 'fully_awake', 'before_sleep', 'on_waking', 'during_sleep'. source can be: 'capillary_blood' ,'interstitial_fluid', 'plasma', 'serum', 'tears', whole_blood', 'unknown'
blood_pressure	{ systolic: 110, diastolic: 70, body_position: 'reclining', location: 'left_wrist' } >Notes: body_position can be 'standing_up', 'sitting_down', 'lying_down', 'reclining' and location can be 'left_wrist', 'right_wrist', 'left_upper_arm', 'right_upper_arm'. These two are only available in Android
mindfulness	1800 Notes: only available on iOS
UVexposure	12 Notes: only available on iOS
nutrition.X	234.9 Notes: for the unit, see the coresponding type in the table above
nutrition	{ item: "cheese", meal_type: "lunch", brand_name: "Cheddar", nutrients: { 'fat.total': 11.5, 'calories': 233.1 } } Note: the brand_name property is only available on iOS For the units of each nutrient, see the coresponding type in the table above Water is treated separately in Android, you will never be able to associate water with the general nutrition, use nutrition.water instead

Methods

isAvailable()

Tells if either HealthKit of Health Connect are available.

cordova.plugins.health.isAvailable(successCallback, errorCallback)

• successCallback: if available a true is passed as argument, false otherwise
• errorCallback: called if something went wrong, err contains a textual description of the problem

getHealthConnectFromStore() Android only

Android only. Launches the PlayStore to retrieve HealthConnect. From Android 14 and up this is not needed, becuase HealthConnect becomes part of the operating system.

cordova.plugins.health.getHealthConnectFromStore(successCallback, errorCallback)

• successCallback: if available a true is passed as argument, false otherwise
• errorCallback: called if something went wrong, err contains a textual description of the problem

launchPrivacyPolicy() Android only

Launches the Privacy Policy screen needed by Health Connect. Use it for testing how it appears.

cordova.plugins.health.launchPrivacyPolicy(successCallback, errorCallback)

• successCallback: screen has been launched
• errorCallback: called if something went wrong

openHealthSettings()

Opens the health app (HealthConnect on Android, Health app on iOS) so that the user can review permissions and settings.

cordova.plugins.health.openHealthSettings(successCallback, errorCallback)

requestAuthorization()

Requests read and/or write access to a set of data types. It is recommendable to always explain why the app needs access to the data before asking the user to authorize it.

If the user has already granted permissions to the app, this function will not prompt the user again, but will call the callback immediately.

cordova.plugins.health.requestAuthorization(datatypes, successCallback, errorCallback)

• datatypes: an object containing data types you want to be granted access to. Example:

{
  read : ['steps'],            // Read permission
  write : ['steps', 'weight']  // Write permission
}

• successCallback: called if permission process completed, called independently of if the user has granted permissions or not, the argument may indicate if the permissions have been granted (but it is not guaranteed that all have been granted)
• errorCallback: called if something went wrong, the argument contains a textual description of the problem

Android quirks

• Currently, permissions can be requested no more than 3 times in an app! This is regardless of if the permissions were granted, denied or the dialog was canceled. This is how it is implemented in HealthConnect, not an issue with the plugin. See discussion here. A workaround in your app can be to check if permissions have been granted upon request and, in the negative case, launch the HealthConnect app instead and ask users to grant permissions manually, which is a horrible user experience.

iOS quirks

• HealthKit does never reveal if the user has actually granted permission. This is by design.
• Once the user has rejected permissions, this function will not prompt the user again, but will call the callback immediately. See this for further explanation.

isAuthorized()

Check if the app has authorization to read/write a set of datatypes.

cordova.plugins.health.isAuthorized(datatypes, successCallback, errorCallback)

• datatypes: an object containing data types you want to be granted access to. Example:

{
  read : ['steps'],            // Read permission
  write : ['steps', 'weight']  // Write permission
}

• successCallback: if the argument is true, the app is authorized
• errorCallback: called if something went wrong, the argument contains a textual description of the problem

iOS quirks

• This method will only check authorization status for writeable data. Read-only data will always be considered as not authorized. This is an intended behaviour of HealthKit.

query()

Gets all the data points of a certain data type within a certain time window.

Warning: if the time span is big, it can generate long arrays!

cordova.plugins.health.query({
  startDate: new Date(new Date().getTime() - 3 * 24 * 60 * 60 * 1000), // three days ago
  endDate: new Date(), // now
  dataType: 'steps',
  limit: 1000,
  ascending: true,
}, successCallback, errorCallback)

• startDate: start date from which to get data
• endDate: end data to which to get the data
• dataType: the data type to be queried (see above)
• limit: optional, sets a maximum number of returned values, default is 1000
• ascending: optional, datapoints are ordered in an descending fashion (from newer to older) se this to true to revert this behaviour
• filterOutUserInput: optional, if true, filters out user-entered activities (iOS only)
• includeCalories: optional, used only for dataType "activity". When querying, for each activity, also the active calories (in kcal) will be added. Warning the app requires access to calories.active to be granted
• includeDistance: optional, used only for dataType "activity". When querying, for each activity, also the distance, run or cycled, (in m) will be added. Warning the app requires access to distance to be granted
• includeRoute: iOS only, optional, use only for dataType "activity". When querying, for each activity, also the route will be added. Warning the app requires access to workout_route to be granted.
  • if true, the activity contains a field route, the route is an array of { lat: number, lng: number, alt: number, timestamp: Date } objects.
  • If the activity contains multiple routes (e.g. the workout was paused), these are concatenated in the same array. Therefore do not try to calculate the distance from the route, but use the distance field instead.
• includeHeartRate: iOS only, optional, use only for dataType "activity". When querying, for each activity, also the heart rate will be added. Warning the app requires access to heart_rate to be granted
  • if true, the activity contains a field heartRate with an array of { bpm: number, timestamp: Date } objects.
• successCallback: called if all OK, argument contains the result of the query in the form of an array of: { startDate: Date, endDate: Date, value: xxx, unit: 'xxx', sourceName: 'aaaa', sourceBundleId: 'bbbb' }
• errorCallback: called if something went wrong, argument contains a textual description of the problem

iOS quirks

• HealthKit does not calculate active and basal calories - these must be input from an app
• HealthKit does not detect activities automatically - these must be input from an app
• When querying for activities, only events whose startDate and endDate are both in the query range will be returned.
• When duration (in seconds) is returned, this may be different than the endTime - startTime and actually more accurate.
• nutrition: vitamin_a is given in micrograms. Automatic conversion to international units is not trivial and depends on the actual substance (see here).

Android quirks

• Health Connect can read data for up to 30 days prior to the time permission was first granted. If the app is reinstalled, the permission history is lost and you can only query from 30 days before installation. See note here.
• Not all datatypes support start and end timestamps, some, such as weight, only have one timestamp. The plugin will just set both start and end to the same value in those cases.
• Active and basal calories can be automatically calculated by Health Connect.
• calories.basal is returned as an average per day (kcal/day), and is usually stored quite sparsely (it rarely change, but chnages in weight and height trigger a ricalculation).
• Calories and distance for activities are actually queried indipendently, using the timestamps for each returned activity. This may considerably slow down the query if the returned activities are many. Use with care.
• sleep in HealthConnect is stored in sessions composed of stages. If you want to retrieve sessions instead of single stages, add the following flag to the query object: sleepSession: true. The returned value will be an array of objects like: [ { startDate: Date, endDate: Date, stage: 'sleep.light' }, ... ]
• heart_rate is in reality stored as an array of values within a given window of time, however, each value is returned separately here to make the API compatible with iOS.

queryAggregated()

Gets aggregated data in a certain time window. Usually the sum is returned for the given quantity.

cordova.plugins.health.queryAggregated({
  startDate: new Date(new Date().getTime() - 3 * 24 * 60 * 60 * 1000), // three days ago
  endDate: new Date(), // now
  dataType: 'steps',
  bucket: 'day'
}, successCallback, errorCallback)

• startDate: start date from which to get data
• endDate: end data to which to get the data
• dataType: the data type to be queried (see below for supported data types)
• bucket: if specified, aggregation is grouped an array of "buckets" (windows of time), supported values are: 'hour', 'day', 'week', 'month', 'year'
• filterOutUserInput: optional, filters out user-entered activities if set to true (only works on iOS)
• successCallback: called if all OK, argument contains the result of the query, see below for returned data types. If no buckets is specified, the result is an object. If a bucketing strategy is specified, the result is an array.
• errorCallback: called if something went wrong, argument contains a textual description of the problem

Not all data types are supported for aggregated queries. The following table shows what types are supported and examples of the returned object:

Data type	Example of returned object
height	{ startDate: Date, endDate: Date, value: { average: 1.8, min:1.7, max: 1.8 }, unit: 'count' } Note: Android only
weight	{ startDate: Date, endDate: Date, value: { average: 73, min:72.5, max: 74 }, unit: 'kg' } Note: Android only
steps	{ startDate: Date, endDate: Date, value: 5780, unit: 'count' }
distance	{ startDate: Date, endDate: Date, value: 12500.0, unit: 'm' }
calories	{ startDate: Date, endDate: Date, value: 2892.4, unit: 'kcal' }
calories.active	{ startDate: Date, endDate: Date, value: 25698.4, unit: 'kcal' }
calories.basal	{ startDate: Date, endDate: Date, value: 3547.3, unit: 'kcal' }
activity	Android: { startDate: Date, endDate: Date, value: 567000, unit: 'ms' } iOS: { startDate: Date, endDate: Date, value: { still: { duration: 520000 }, walking: { duration: 223000 }}, unit: 'activitySummary' } Note: durations are expressed in milliseconds
sleep	{ startDate: Date, endDate: Date, value: 493, unit: 's' } Notes: Android only
appleExerciseTime	{ startDate: Date, endDate: Date, value: 500, unit: 'min' } Notes: iOS only
heart_rate	{ startDate: Date, endDate: Date, value: { average: 72, min: 68, max: 82 }, unit: 'bpm' }
nutrition	{ startDate: Date, endDate: Date, value: { fat.total: 11.5, calories: 233.1 }, unit: 'nutrition' } Note: units of measurement for nutrients are fixed according to the table at the beginning of this README
blood_pressure	{ startDate: Date, endDate: Date, value: {diastolic_average: 80, systolic_average: 120, diastolic_max: 85, systolic_max: 132, diastolic_min: 74, systolic_min: 112 }, unit: 'mmHg' } Notes: Android only

Quirks

• Health Connect does not currently support grouping by activity type, therefore only the total time for all activities can be returned.
• The start and end dates returned are the date of the first and the last available samples. If no samples are found, start and end may not be set.
• When bucketing, buckets will include the whole hour / day / month / week / year where start and end times fall into. For example, if your start time is 2016-10-21 10:53:34, the first daily bucket will start at 2016-10-21 00:00:00.
• Weeks start on Monday.
• Aggreagated height only exists on Android.

Android quirks

• Currently, it is not possible to group by activity type in aggregated queries, only the total time for all activities can be returned. See discussion here.

store()

Stores a data point.

cordova.plugins.health.store({
	startDate:  new Date(new Date().getTime() - 3 * 60 * 1000), // three minutes ago
	endDate: new Date(),
	dataType: 'steps',
	value: 180,
}, successCallback, errorCallback)

• startDate: start date from which the new data starts
• endDate: end date to which he new data ends
• dataType: the data type
• value: the value, depending on the actual data type
• successCallback: called if all OK, in Android, argument returns the ID of the data point that has been inserted
• errorCallback: called if something went wrong, argument contains a textual description of the problem

iOS quirks

• In iOS you cannot store the total calories, you need to specify either basal or active. If you use total calories, the active ones will be stored.
• In iOS distance is assumed to be of type WalkingRunning, if you want to explicitly set it to Cycling you need to add the field cycling: true.
• When storing an activity, you can also specify calories (active, in kcal) and/or distance (in meters). For example: dataType: 'activity', value: 'walking', calories: 20, distance: 520. Distance is set as DistanceWalkingRunning unless an additional cycling: true is added to the object. Be aware that you need permission to write calories and distance first, or the call will fail.
• In iOS you cannot store the total calories, you need to specify either basal or active. If you use total calories, the active ones will be stored.
• In iOS distance is assumed to be of type WalkingRunning, if you want to explicitly set it to Cycling you need to add the field cycling: true.

Android quirks

• This operation correponds to an insert, not an update. If you want to update the data point you need to delete it first.
• Not all datatypes support start and end timestamps, some, such as weight, only have one timestamp. The plugin will use the start timestamp to set the end timestamp when querying.
• In Android you can only store basal rate, that is a power. This is estimated from the kcals provided as an argument, divided by the time between the start and end time. When you query the individual sample, you get the kcal/day back, not the kcal, unless you do an aggregated query.
• When storing heart_rate, you can also provide the value as an array of [ {bpm: 81, timestamp: Date }, ... ]. This is how the heart rate is actually stored internally and is probably more efficient.
• sleep in HealthConnect is stored in sessions composed of stages. By default, this function will store each stage as an indipendent session, but if you want to aggregate the stages into a single session, use the flag: sleepSession: true and use an array of objects like [ { startDate: Date, endDate: Date, stage: 'sleep.light' }, ... ] where each object is a stage, as value.
• nutrition in Android is always associated to a specific food item. When storing a single nutrient, like nutrition.sugar, the plugin creates an empty food item with that nutrient. Use food items when possible.
• nutrition.water is treated separately in Android than the other nutrients, and cannot be associated to a specific food item. This also means that you cannot add it to a nutrition item, nor will you find it when querying nutrition.

delete()

Deletes data points. You can either delete a single data point (using its id, Android only), or a set of datapoints within a time range.

cordova.plugins.health.delete({
	startDate:  new Date(new Date().getTime() - 3 * 60 * 1000), // three minutes ago
	endDate: new Date(),
	dataType: 'steps'
}, successCallback, errorCallback)

or (Android only):

cordova.plugins.health.delete({
	id: '812n12123nd23edj3234'
	dataType: 'steps'
}, successCallback, errorCallback)

• startDate: start date from which to delete data
• endDate: end date to which to delete the data
• id: id of the point to be deleted (Android only for now)
• dataType: the data type to be deleted
• successCallback: called if all OK
• errorCallback: called if something went wrong, argument contains a textual description of the problem

iOS quirks

• You cannot delete the total calories, you need to specify either basal or active. If you use total calories, the active ones will be delete.
• Distance is assumed to be of type WalkingRunning, if you want to explicitly set it to Cycling you need to add the field cycling: true.
• Deleting sleep is not supported at the moment.

Android quirks

• Health Connect doesn't allow you to delete data points that were generated by other apps, only those generated by your app.

External resources

• The official Apple documentation for HealthKit can be found here.
• For functions that require the unit attribute, you can find the comprehensive list of possible units from the Apple Developers documentation.
• HealthKit constants, used throughout the code.
• Health Connect supported data types.

Contributions

Any help is more than welcome! Raise issues, send Pull requests. I usually reply quickly. I know that this plugin is used in production in some commercial apps (includine mine), so I take it seriously.

I don't know Objective C and I am not interested in learning it now, so I would particularly appreciate someone who could give me a hand with the iOS part. Also, I would love to know from you if the plugin is currently used in any app actually available online. Paid consultancy is also possible if you need to speed up some part of the plugin, or other stuff. Just send me an email to my_username at gmail.com.

Thanks!