Wallet notifications are visible, so restraint matters. Mid-progress reminders work when they reference real progress and a concrete reward.
Trigger on progress, not calendar noise
Remind customers who are one or two stamps away from a reward, or who have not scanned in a defined window. Avoid daily blasts.
Pair updates with value
Change a visible field on the pass when you notify so the lock screen message matches what customers see inside the wallet.
Use location carefully
Relevant locations can surface the pass near your store, which is often more welcome than generic push copy.
Measure opt-outs and redemptions
Track installs, notification-driven visits, and redemption rate to tune frequency.