Mikkel Blom
All work

Finance Tracker

2026 Logging an expense in three seconds Prototype

A personal finance app for Android and iOS. Logging what you spend should take about three seconds: open the app, type the amount, tap a category.

Home, quick entry, calendar and insights, with made-up demo data

Why I made it

Most budgeting apps want you to categorise a long list of bank transactions after the fact, and I never kept up with that. This one is built around entering things as they happen, with no account and no network needed. I ended up not using it day to day, so it stopped at a working prototype.

A few decisions

  • Money is stored as whole øre (integers), never as floats.
  • Rent and salary post themselves and are kept out of the day-to-day spending figure, so one big payment doesn't make the daily average useless.
  • Entries are append-only with a UUID and soft delete, so syncing between devices would be simple later.