For readers of the book
An app for the 1% idea in Atomic Habits
You already know the argument. Small changes, repeated, beat big ones attempted. This is a tracker built for that and almost nothing else.
Last reviewed 27 August 2026
Not affiliated with James Clear. Get1%better is an independent app. Atomic Habits is his book and his trademark, and we name it here only to say which idea this tool is built around. If you have not read it, read it — this is not a substitute for it.
The part of the book this is built on
The 1.01365 = 37.78 calculation is the passage everyone remembers, and it is the reason the idea spreads. But the number is the hook, not the mechanism. The mechanism is the sentence underneath it: that habits compound, and that showing up on an ordinary day counts more than performing on a good one.
Which means the useful tool is not the one with the most features. It is the one you still open on day 40, when nothing feels different and the graph has not moved.
What it does
Five things a day. Not fifty habits with checkboxes. Five is enough for a normal day and short enough to finish on a bad one, and finishing is what makes it hold. That is the free plan; Pro lifts the cap for the days that genuinely need more.
A square for every day. Grey if you missed it, green if you showed up, darker green the more you did. After a month you can see your own pattern rather than guess at it — which is the “make it obvious” idea applied to the evidence rather than the cue.
Days settle once they pass. You can edit today and yesterday; older days lock. A record you can quietly tidy up is not a record, and the whole value here is that the grid tells you the truth when you would rather it did not.
Folders. File a task under the part of your life it belongs to — the business, the family, the training. Then the insights answer the question a streak cannot: not whether you showed up, but what you showed up for.
What it deliberately does not do
No habit stacking builder. No cue-craving-response wizard, no identity-statement prompts. Those are ideas to think about once, not screens to fill in daily, and an app that makes you configure a framework before you can tick a box has already lost the day.
No gamification. No points, no levels, no avatar to feed. The square filling in is the reward, and it has the advantage of being true.
No streak you cannot afford to break. The streak is there, and it resets when you miss — but the grid stays, and the grid is the honest measure. A missed Tuesday in an otherwise green month is what a real year looks like.
Where the 37.78 comes from
1.01365 = 37.78, and the half that gets quoted less: 0.99365 = 0.03. The same daily decision in opposite directions, a thousandfold apart after a year. Nobody actually gets thirty-seven times better at anything — treat it as the reason to start rather than a forecast. We wrote the longer version in what “1% better every day” actually means.
What it costs
The daily loop is free forever — 5 tasks, the streak, reminders, folders and times, with no card. Pro opens the archive beyond 14 days and the analysis of it. The split is deliberate: the habit is what you need on day one, the archive is what you want in year two. See exactly what is free or the plans.
Get1%better
Five things a day, and a year of squares to prove it