← all work

PeraPlano

Privacy-first Android budgeting that tracks spending from your transaction notifications.

  • mobile
  • security
  • fintech

▲ In closed beta with selected users · public release planned for December 2026 · privacy-by-design · tracking derived from transaction push notifications.

demo ↗
PeraPlano cover
/work/peraplano/cover.webp · 16:10

problem

Manual expense logging is high-friction and most budgeting apps expose sensitive financial data. Users needed private tracking that updates itself.

my role

Sole developer: Android app, encryption model, and notification-derived transaction tracking.

key decisions

  1. Encrypted user financial data: privacy-by-design for sensitive personal records.
  2. Derives income and expense tracking from transaction push notifications, minimising manual input.
  3. Daily, monthly and annual budgeting and savings goals with threshold alerts.
  4. Roadmap includes optional premium features via in-app purchases.

stack

  • React Native (Expo)
  • React Navigation
  • TypeScript
  • On-device AI
  • SQLCipher
  • TanStack Query
  • Kotlin

evidence

PeraPlano

in beta

One bank notification becoming a ledger entry: parsed into amount, direction, merchant and category, then committed and reflected in what is safe to spend. All of it on the device.

captured 2026-09-08 · peraplano.filhmar.online

peraplano.filhmar.online ↗

screens

System architecture
/work/peraplano/architecture.webp · 16:10
System architecture
Main screen
/work/peraplano/screen-1.webp · 9:19.5
Main screen
Key workflow
/work/peraplano/screen-2.webp · 9:19.5
Key workflow
Ask my assistant