Hi @bhaveshsood,
In general, it is quite difficult to get a reliable information when a user stops using the app, especially in Adalo.
One of the easiest ways could be to add a “last active datetime” property to Users collection, and on every app screen put an action Update Logged-in User → last active datetime, set to Current Time.
With this you will see when a user entered a certain screen last time.
Best,
Victor.