PWA · Digital letters
PostPocket
Turn a moment into a 3D foil letter sent through one link — plus a daily photo Pocket, retro TV and photobooth. No sign-up, no app.
- Role
- Backend, security & data
- Context
- Collaboration with Muhammad Haikal Faruq
- Year
- 2026
- Status
- Live · v1.0
01 / Overview
About the project
Photos in a phone gallery rarely get opened again, and messages in chat sink fast. PostPocket turns one moment into an object: a foil-printed card you can rotate, open and read like a real letter. The recipient just taps a link in WhatsApp — no account, no install.
I owned the backend, security and data side: the Supabase schema with row-level security per user, Edge Functions behind an OpenAPI contract, the shared “Kotak bareng” box where many friends leave letters for one person, Google sign-in with an optional 100-photo Pocket backup, account deletion, and hourly cleanup jobs that expire letters after 30 days and photos 7 days after opening.
02 / Highlights
What it does
- 01
3D foil cards in pure CSS — five designs, six foils, six papers
- 02
Letters sent through one link with WhatsApp preview and replies
- 03
Kotak bareng: many friends, one box, opened together on schedule
- 04
Daily photo Pocket calendar, retro TV album and photobooth strips
- 05
Row-level security on every table and token-guarded edits
- 06
Photos resized and stripped of location in the browser, uploaded via signed URLs
- 07
Hourly cleanup job and per-network rate limits
- 08
Offline-capable PWA, tested on Android, iPhone and desktop
03 / Gallery
Screens & moments
A closer look at the product — interfaces, flows and details.
- HomeScreenshot coming soon01
- Foil letter editorScreenshot coming soon02
- Letter contentScreenshot coming soon03
- Pocket calendarScreenshot coming soon04
- Kotak barengScreenshot coming soon05
- BoothScreenshot coming soon06