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 your own hand.

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

Privacy

Nothing leaves your phone

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..

Datum has none. There is nothing to breach, and nothing to sell.