Datum

Everything has a price.

Datum is a journal kept in receipts — a record of your days, written one purchase at a time.

The Idea

A journal, not a budget

Budgeting apps want you to change. Datum wants you to remember. There are no goals here, no streaks, no red numbers scolding you at the end of the month – only entries, kept by your own hand.

Manual by design. The friction is the point — what you record yourself, you remember.

Scroll back to March and see the trip, the bad week, the first apartment.

Privacy

Nothing reaches us

Every calculation, every report, is made on your phone. No analytics, no telemetry.

Entries sync and back up through your own Apple iCloud account. We never see them.

We keep no accounts and no copies of your entries. There is nothing to breach, and nothing to sell.