01 / Case study 2026
Ledger
A money tracker for people who do not want an account, a sync engine or a subscription. Open it, log what you spent, close it.
Preview / coming soon
The idea
Most finance apps want an account before they will show you a number. Ledger starts from the opposite end: a single local database you own, opened by an app that starts instantly.
The build
The interface is deliberately small. One screen for the month, one for entry, one for the trend. Everything else is a setting, and there are very few settings.
- Everything stored locally — no account, no sync, no cloud
- Import statements from any bank as CSV
- Keyboard-first entry for fast logging
- No telemetry and no network calls
The hard part
The hard part is not the ledger. It is making a year of transactions feel instant while staying honest about money: integer cents, explicit rounding, and a test suite that refuses to drift.
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