Promisify ยท last updated 11 September 2026
Promisify is a small app for making and sharing promises. This page says plainly what it stores and what it does not.
When you first open the app it creates an anonymous account for you. We do not ask for your name, email or phone number. If you later choose to sign in with Apple or Google, we store the name that sign-in gives us so your promises can show who made them.
The promises you write: their text, category, deadline, penalty, status, and who they were made to. These live in Google Firebase (Firestore) on Google's servers. We also store a push notification token for your device so we can tell you when someone marks a promise you made, and counts of your kept and broken promises.
Every promise has a receipt link. Anyone who has that link can see the promise and mark it kept or broken. Only share it with the person you made the promise to. We record that a receipt page was viewed or marked, so we can tell how the app is being used; we do not record who viewed it.
Free users see a banner ad from Google AdMob, which may use an advertising identifier as described in Google's policy. We do no advertising tracking beyond that, and we do not sell or share your data with anyone else. Purchases are handled by the App Store or Google Play through RevenueCat; we never see your payment details.
Email us and we will delete your account and every promise attached to it.