Android app
Assinaí
App that shows what subscriptions really cost, warns about upcoming charges and records the savings from each cancellation.
- Own product
- Personal finance · subscriptions
- 2026
- In closed testing on Google Play
- Category
- Android app
- Segment
- Personal finance · subscriptions
- Year
- 2026
- Status
- In closed testing on Google Play
Product context
Small subscriptions add up and charges arrive without warning, with no clear picture of what they cost per year.
Need
Show the waste and what is worth reviewing without reading cards, connecting to banks or cancelling anything on the person’s behalf.
Project scope
- Android app, with iOS prepared
- Own API and database
- Free plan and Premium subscription
- Portuguese, English and Spanish
Delivered solution
A savings assistant where people add their subscriptions, see how much they spend, review what they barely use and record cancellations made outside the app, following the savings over time.
Technical highlights
- Deterministic savings engine that runs on the device
- React Native with Expo, a Fastify API and PostgreSQL
- Firebase Authentication and subscriptions through RevenueCat
- Local and push notifications for upcoming charges
Technology
- React Native
- Expo
- TypeScript
- Fastify
- PostgreSQL
- Firebase
- RevenueCat
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