diff --git a/api/app_management/openapi.yaml b/api/app_management/openapi.yaml
index 8d65d6ad..95b586af 100644
--- a/api/app_management/openapi.yaml
+++ b/api/app_management/openapi.yaml
@@ -304,6 +304,21 @@ paths:
           $ref: "#/components/responses/ComposeAppStoreInfoListsOK"
         "500":
           $ref: "#/components/responses/ResponseInternalServerError"
+  
+  /apps/upgradable:
+    get:
+      summary: Get the list of upgradable apps from installed app.
+      description: |
+        (TODO)
+      operationId: upgradableAppList
+      tags:
+        - AppStore methods
+      responses:
+        "200":
+          $ref: "#/components/responses/UpgradableAppListOK"
+        "500":
+          $ref: "#/components/responses/ResponseInternalServerError"
+
 
   /apps/{id}:
     get:
@@ -482,7 +497,7 @@ paths:
     patch:
       summary: Update container images of compose app to match the compose app in AppStore.
       description: |
-        TODO - add description
+        Update a ComposeApp to the latest version of the app in the AppStore.
       operationId: updateComposeApp
       tags:
         - Compose methods
@@ -928,6 +943,18 @@ components:
                     items:
                       $ref: "#/components/schemas/GlobalSetting"
 
+    UpgradableAppListOK:
+      description: OK
+      content:
+        application/json:
+          schema:
+            allOf:
+              - $ref: "#/components/schemas/BaseResponse"
+              - properties:
+                  data:
+                    type: array
+                    items:
+                      $ref: "#/components/schemas/UpgradableAppInfo"
     AppStoreListOK:
       description: OK
       content:
@@ -1444,6 +1471,31 @@ components:
             type: string
             example: "8384"
 
+    UpgradableAppInfo:
+      title: Upgradable app info
+      description: |-
+        Schema for `UpgradableAppListOK` response.
+      required:
+        - title
+        - version
+        - store_app_id
+        - status
+      properties:
+        title:
+          type: string
+          example: "{en_US:\"Syncthing\"}"
+        version:
+          description: current version of the installed app
+          type: string
+          example: "v10.2"
+        store_app_id:
+          $ref: "#/components/schemas/StoreAppID"
+        status:
+          type: string
+          enum:
+            - "idle"
+            - "updating"
+
     AppStoreInfo:
       title: StoreInfo of an app
       description: |-
diff --git a/route/v2/appstore.go b/route/v2/appstore.go
index d57342d3..5953a86b 100644
--- a/route/v2/appstore.go
+++ b/route/v2/appstore.go
@@ -363,3 +363,30 @@ func FilterCatalogByAppStoreID(catalog map[string]*service.ComposeApp, appStoreI
 		return lo.Contains(appStoreIDs, storeAppID)
 	})
 }
+
+func (a *AppManagement) UpgradableAppList(ctx echo.Context) error {
+	composeApps, err := service.MyService.Compose().List(ctx.Request().Context())
+
+	var upgradableAppList []codegen.UpgradableAppInfo = []codegen.UpgradableAppInfo{}
+	if err != nil {
+		message := err.Error()
+		return ctx.JSON(http.StatusInternalServerError, codegen.ResponseInternalServerError{Message: &message})
+	}
+	for id, composeApp := range composeApps {
+		if composeApp == nil {
+			continue
+		}
+
+		if composeApp.IsUpdateAvailable() {
+			upgradableAppList = append(upgradableAppList, codegen.UpgradableAppInfo{
+				Title:      composeApp.Name,
+				Version:    "",
+				StoreAppID: lo.ToPtr(id),
+				Status:     "upgradable",
+			})
+		}
+	}
+	return ctx.JSON(http.StatusNotImplemented, codegen.ResponseOK{
+		Message: lo.ToPtr("not implemented"),
+	})
+}