Budget Tracker
Give every dollar a job with envelope budgeting. Each envelope’s balance is derived from an append-only ledger of spending — never a number we overwrite. No account needed — your envelopes live on this device. Sign in to keep them safe and continue from anywhere.
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How it's built
- Pattern: the accounting archetype — an envelope is an account; every expense is an immutable entry in an append-only ledger.
- Derived balances: spent and remaining are never stored — they are
SUMmed from the ledger on every read, so the numbers can’t drift from the facts. - Corrections, not deletes: removing an expense posts a reversal entry that nets it out — the history stays intact and auditable.