Pro belongs to your LapperSnapper account, not to a phone.

Steps

1. Install LapperSnapper on the new phone.
2. Sign in with the same account you purchased with — the same email, or the same Google account. (Purchases require sign-in for exactly this reason.)
3. Pro unlocks as soon as your entitlement syncs — usually seconds after signing in.

If Pro doesn't appear

1. Check you're signed in as the right account — the email shown in Settings should match the one you bought with.
2. Check the subscription is actually active in the store: iPhone Settings → your name → Subscriptions, or Google Play → profile → Payments & subscriptions.
3. Make sure the phone is signed into the same store account that made the purchase, and use the store's restore-purchases path if offered.
4. Still locked? Email contact@lappersnapper.com with your account email and the store receipt — we'll sort it.

Switching between iPhone and Android

Your account, sessions, and cloud backup move freely between platforms. Store subscriptions, though, live with Apple or Google — if you change platforms for good, cancel on the old store and re-subscribe on the new one.