Budgie

Small on purpose

Budgie does one job: it records income and expenses, groups them by category and shows the balance for a month. There is no account, no sync and no server. All data is one SQLite file on the user’s machine, so the app works the same with or without a connection.

Money as integers

Amounts are stored as integer grosze, hundredths of a złoty, never as floating point numbers, so sums and the balance are always exact. The form accepts a value like 12.50, Zod coerces and validates it, and it is converted to grosze only when it is written to the database.

Drizzle on the Tauri SQL plugin

The database is opened by Tauri’s SQL plugin in the Rust core, and the frontend reaches it through Drizzle’s sqlite-proxy driver. The plugin returns rows as objects while Drizzle expects arrays of values, so a short adapter maps every row to its values in column order. One schema file is the source of truth for both the queries and the TypeScript types.

Logic outside the interface

The balance, the per-category breakdown and the month filters are pure functions with no dependency on Tauri, which makes them easy to test: 23 Vitest tests cover them and the form validation. Categories are one constant list typed as a tuple, so the form, the validation schema and the stored data share a single definition.