Know yourself, one datum at a time.

Everything is a datum

A datum is a moment in time with a few tags. A tag is a name, and, if you like, a value.

1. mood7

   Log it

   Type a tag, add a value, press Enter. Datums remembers your tags, so most entries take a couple of taps.

2. todoCall a friend

   See it

   Views understand certain tags: todos show up in Todos, habits in Habits, money in Finances. Any tag works in the rest.

3. sleep (hours)7.5

   Learn from it

   Analysis charts any tag over time, and shows how two of them move together, like your sleep and your mood.

One log, many views

The same entries, shown the way that suits them. Make a datum in any view and it shows up everywhere it belongs.

• Datums

  Every entry, newest first, filterable.

• Today

  Today's habits, todos, events, and check-ins.

• Todos

  Tasks with priorities, ticked off when done.

• Habits

  Daily habits, checked off, with streaks.

• Timers

  Time anything, start to stop.

• Timeline

  Your days, hour by hour.

• Calendar

  Events, and everything else, by date.

• Finances

  Spending and income, by category.

• Notes

  Longer thoughts, with titles.

• Tags

  Every tag you use: how often, and how lately.

• Analysis

  Charts and patterns for any tag.

Private by design

What you log is about you, so it stays with you.

• On your device

  Everything is stored, encrypted, in your own browser, not on someone else's server.

• No account, no tracking

  No sign-up, no ads, no analytics. Open it and start.

• Works offline

  Install it on your phone or computer, and it works anywhere, signal or not.

• Yours to keep

  Export everything as a CSV file any time, and import it back whenever you like.

• Sync, if you want it

  Sync across your devices is optional, and end-to-end encrypted with a passphrase only you know.