An Amragrum account is deleted inside the app, after you sign in. This page only explains the path. It does not delete anything by itself.
Open Amragrum. If it is not on your phone yet, install it from the App Store or Google Play, then open it.
Log in to the account you want to delete. If you are already signed in, stay on that account. Only the account you are logged into can be deleted.
From your profile, open Settings.
In Settings, choose Personal data. That is where the account itself is managed.
Choose to delete the account and confirm. The account and the personal data tied to it are then removed.