In order to have Hopper watch trips and notify you about when to book, you must search for a flight and tap "Watch This Trip" on the following screen.
You also must agree to allow Hopper to send you push notifications.
For iOS: If you declined push notifications at first, you can always change this by:
- Head to your iPhone's Settings
- Tap Notifications
- Tap Hopper
- Tap the switch to "Allow Notifications"
- Head to your phone's Settings
- Head to your phone's Notifications settings
- Locate and tap Hopper and make sure that notifications are enabled