Lifetime purchases can be restored either in the Android app or the iOS app depending on where you made the purchase.

Android app

Open Google Play and make sure that you are signed in with the same account you used to make the purchase. Go to the Tripomatic app, sign in with your account and go to the Premium purchase screen. Tap the three dots in the upper right corner and restore your purchase.

iOS app

Make sure that you are signed in with the same Apple ID that you used to make the purchase. Go to the Tripomatic app, sign in with your account and go to the Premium purchase screen. Restore a previously-made purchase by tapping the “Restore” link in the upper right corner.