High storage comsumption for personal data

[FlightMS]

Avoid duplicates

• Bug is not mentioned in the FAQ
• Bug is specific for iOS only, for general issues / questions that apply to iOS and Android please raise them in the documentation repository
• Bug is not already reported in another issue

Technical details

• Device name: iPhone 11
• iOS version: 14.6
• App version: 2.2.1

Describe the bug

The app seems to be have a high storage comsumption. As you can see in the screenshot, it needs ~131 MB for personal data.

Is that a normal amount for the app?

Steps to reproduce the issue

1. Open Settings app
2. Check storage management for the Corona-Warn-App

Expected behaviour

Less more storage used for personal data by the app.

Possible Fix

Additional context

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Internal Tracking-ID: EXPOSUREAPP-7589

[Ein-Tim]

Hey @FlightMS

Thank you for reporting this issue. Do you see this behavior since a special CWA/iOS version?
We had a similar issue before, #1549, this was fixed back in version 1.9.

On my iPhone CWA's "Dokumente & Daten" are ca. 70 MB, you have nearly twice of this, so I don't think this is normal.
Do you have a test registered, many check-ins or contact diary entries?

[FlightMS]

I saw this the first time when I created the screenshot yesterday. Before I've never checked the storage consumption before.
So I can't say if the problem occurs since a specific version.

I have one registered Rapid Test (the first ever), some contact diary entries (not very much - only a few days), some QR Code check-ins and 12 places and 4 persons.

[heinezen]

@FlightMS

Interesting. Thanks for reporting this to us. The dev team will have a look at this.

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Corona-Warn-App Open Source Team

[Ein-Tim]

@FlightMS One more question, did you activate the new error logging feature in the app?

[FlightMS]

@Ein-Tim No that's not activated

[FlightMS]

„Dokumente & Daten“ are still increasing on my iPhone. Now it‘s about 212,2 MB.

[Ein-Tim]

I'll now start logging my numbers here:

iPhone XR:

• CWA-Version: 2.5.1
• iOS-Version: 14.7
• App Größe: 32,1 MB
• Dokumente & Daten: 129,9 MB -> Contact diary entries, COVID certificates

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iPhone 6s:

• CWA-Version: 2.5.1
• iOS-Version: 15.0 Public Beta 3
• App Größe: 31,6 MB
• Dokumente & Daten: 23,9 MB -> No contact diary entries, only one COVID certificate

[Ein-Tim]

@thomasaugsten

You said back in #1549 (comment) that iOS doesn't automatically "clean up temporary system files of the app" and that you "add a feature to trigger this system clean up manually", is this still in place and works?

[dsarkar]

@FlightMS @Ein-Tim Thanks for the update. Forwarded into the internal ticket.

[Ein-Tim]

11 days have passed since my last comment and here are my new numbers:

iPhone XR:

• CWA-Version: 2.6.2
• iOS-Version: 14.7.1
• App Größe: 37,3 MB
• Dokumente & Daten: 172,4 MB -> Increase of ca. 50 MB? Why?

---

iPhone 6s:

• CWA-Version: 2.6.2
• iOS-Version: 15.0 Public Beta 4
• App Größe: 36,3 MB
• Dokumente & Daten: 36,6 MB -> Seems ok

[FlightMS]

I can also share my new numbers here:

On my iPhone 11 „Dokumente & Daten“ is now about 221,2 MB with version 2.6.2.
I‘ve entered one rapid test result and scanned one check-in QR code within the last 14 days.

[Ein-Tim]

@FlightMS

Please update to the latest CWA version & iOS 15 and let us know if anything changed.

[FlightMS]

@Ein-Tim

No change here. I‘ve stopped scanning codes and entering data in the contact journal some time ago.

[dsarkar]

@FlightMS Thanks for the feedback. The information was forwarded to the internal ticket. CC @Ein-Tim Thanks.

[FlightMS]

Time for some updates. Just right now this is my space used with my iPhone 11 and iOS 15.2

[dsarkar]

@FlightMS Thanks for update, forwarded to internal ticket.

[FlightMS]

Seems something happened here

[Ein-Tim]

This issue is fixed for me:

@FlightMS Can the issue be closed?

[FlightMS]

@Ein-Tim thanks for the confirmation.

Issue closed

[dsarkar]

@Ein-Tim @FlightMS Thanks for the feedback, which I forwarded to the internal ticket.