I wonder why you will want to stop the notifications.
We barely send out notifications, except it is extremely important to notify you of something new. Else since your reflections are offline, you can always access them.
Here are the steps
1. Go to SETTINGS in your Android device
2. Click on APPS. This will bring you the list of all your apps
3. Select Daily Strength Devotional app in the list.
4. Under the ‘FORCE STOP’ You will see ‘SHOW NOTIFICATIONS’ uncheck it to stop receiving important information from the Daily Strength Devotional Android app.