To delete and re-install ForeFlight Mobile, hold your finger on the ForeFlight icon until all the icons wiggle. Next, tap the (X) in the corner of the ForeFlight icon. Press the round Home button under the screen to get back to normal mode.
To reinstall ForeFlight Mobile, open the App Store app, search for "ForeFlight", and tap on ForeFlight Mobile to download the app.
NOTE: Deleting the app will delete all non-synced items. You may want to send us an email if you are wanting to delete the app to fix a problem. Also, after downloading, you will need to sign in to the application to access your previously purchased subscription.