Overview
StampJar is an iPhone-first family rewards app for parents. Parents create a family, add parent-managed child accounts, define tasks and rewards, match QR submissions, approve pending stamps, and redeem rewards.
Data StampJar Uses
StampJar may process parent account details such as email address and display name, family names, child account names, avatar colors, tasks, rewards, stamp transactions, redemption records, QR tokens, pending QR submissions, contributor names, and notes. Balances are derived from approved immutable transactions rather than stored as a mutable source of truth.
QR Submissions
Parents can share a child QR code with a trusted adult. The public QR route matches the scan to the right child account and public task while exposing only limited context needed to submit a pending stamp. QR submissions stay pending until a parent approves them in the StampJar app.
Supabase
StampJar uses Supabase for authentication, database storage, row-level security, and server-side functions. Supabase may process account, family, task, reward, stamp, redemption, and QR submission data so StampJar can sync parent-owned family data.
Purchases and Subscriptions
StampJar Plus is an optional parent-facing subscription. Apple StoreKit processes purchases, renewals, cancellations, refunds, and restore requests. StampJar may store verified subscription entitlement details such as product ID, transaction IDs, status, renewal or expiration date, and App Store environment so parent accounts can unlock paid family limits. Purchase UI is not shown in child mode or public QR contributor flows.
Website Hosting
This website is hosted on Vercel. Vercel may process routine request information such as IP address, browser user agent, requested URL, and timestamps for hosting, security, and operations. See Vercel's Privacy Policy for details.
No Tracking or Advertising
StampJar V1 does not include third-party advertising, social feeds, classroom mode, allowance or money mode, AI features, analytics, or child-facing purchases. StampJar does not sell personal information and does not track users across apps or websites.
Children
StampJar is parent-managed. Parents are responsible for creating child accounts, choosing what child information to enter, and deciding which QR codes to share with trusted adults.
Data Choices
Parents can edit family setup inside the app. Parents can rotate QR tokens when a code should stop working. For account or support data questions, email p.hlavatik@gmail.com.
Contact
For privacy questions, contact Peter Hlavatik at p.hlavatik@gmail.com.