Set the experiment
Pick from thirty prebuilt experiments or write your own. Choose the length, the cadence, how many rest days a week, and what counts as proof.
How it runs
Four steps, then it ends.
A Trial is a fixed window with a start, a finish and a result. That is the whole design: the thing most habit apps never do is stop.
Bring people in
Share a code. Friends join as members, or come in as observers who can watch and cheer without running it themselves. You can add someone after it starts.
Check in daily
A photo, a caption, and which version you managed. Miss a day and you can say why. Plan a rest day and it does not count against you.
Read the result
On the last day everyone gets adherence, streaks, the chart of daily answers, and a card worth sending to the group. Then you decide whether to run it again.
Floor, target, reach
Three versions of the same day.
A checkbox throws away the difference between a 45-minute run and dragging yourself around the block — and that difference is the only thing your group can actually respond to. So every experiment has three versions, and all three keep the streak alive.
Floor
Shoes on, walk to the end of the road.
The version that survives a bad week. It counts exactly as much as the others.
Target
Walk for 30 minutes before noon.
What you actually set out to do, and the one the experiment is named after.
Reach
An hour, outdoors.
There on the good days, so a good day has somewhere to go.
Showing up small still counts as showing up.
The library
Thirty experiments, already written.
Each one comes with a length, a cadence, a floor and a reach, and where it helps, a daily question you answer from one to ten so the chart at the end has something to say. Six of them:
Moving more
Walk for 30 minutes before noon
The easiest thing to keep going, and the one most likely to still be happening in a year.
30 days · daily · 1 rest day a week
Sleep
Phone charges outside the bedroom
The single change people report the biggest difference from, and the one they resist the hardest.
21 days · daily
Focus
Phone in another room while you work
A phone in sight costs attention even face-down and untouched. Distance is the variable.
14 days · weekdays
Food & energy
A glass of water before your first coffee
The lowest-effort experiment in the library. Worth running first if you have never finished one.
21 days · daily
Head & mood
Ten quiet minutes in the morning
The floor here is genuinely three breaths. That is the version that gets you to day thirty.
30 days · daily
Doing the work
Thirty minutes on the thing you're avoiding
Watch the dread score fall over three weeks. It usually does, and seeing it is the point.
21 days · daily
The group
Built for the people who notice.
A room per experiment
Every Trial has its own chat, and the check-ins land in it. You can send a private note to one person instead of the whole group — invisible to everyone else at the database level, not merely hidden in the app.
Missed days have context
A missed day can carry a reason. Without one, a group can only say "you've got this". With one, they can say something useful.
Observers, not just members
Someone can follow your experiment without running it. Useful for the friend who wants to keep you honest and has no intention of giving up coffee.
Leaving is allowed
You can end your own run early, mute a Trial's reminders, or archive it out of sight. Leaving takes your check-ins, your messages and your photos with you.
Privacy
There is no analytics code to switch on.
Trial is made by one person, and it is not an advertising business in a habit tracker's clothes. The list below is not a promise about intent — it is a description of what is in the app.
- No analytics SDK. Nobody is measuring which screens you open.
- No ads, no tracking. No advertising identifier, nothing cross-app.
- No location. The app never asks. The city on your profile is a word you typed.
- No contacts. The app never asks for your address book.
- Photos stay in the group. Private bucket, links that expire after an hour.
- Photos are deleted seven days after the experiment ends. Your results survive.
- Nothing trains a model. Not your photos, not your messages, ever.
- Delete everything from inside the app, in one place, for good.
The long version is the Privacy Policy, which lists every field the database actually holds and why it is there.
Questions
The obvious ones.
What does it cost?
Nothing. There are no purchases in the app. If a feature is ever paid it will be the optional pattern insights, it will be said clearly in the app first, and anyone who joined before launch keeps them free for the life of the app.
Do I need friends to use it?
No. A Trial can be private and run alone, and it still keeps the streaks, the chart and the result. It is better with people, which is the whole argument for the app, but it does not refuse to work without them.
What happens if I miss a day?
The streak breaks and the experiment carries on. You can add a note about why, and you can plan rest days in advance — a planned day off is not a missed one. Nothing is deleted and nothing locks you out.
Who can see my check-in photos?
In a private Trial, only you. In a group Trial, the people who joined with the code. In a public one, photos stay hidden unless the host turns sharing on, and you can withdraw your own photo at any time regardless of what the host approved.
Do I have to post a photo?
Not necessarily. The person who creates the experiment chooses what counts as proof, and photo-optional is one of the settings.
How do I delete my account?
Settings → Delete account, inside the app. It removes your profile, check-ins, photos, messages, rest days, notes and memberships. It cannot be undone. The one exception is feedback you sent through the app, which survives with your account detached from it.
How old do you have to be?
Thirteen. Under the age of majority where you live, a parent or guardian needs to agree to the Terms on your behalf.
Is this health advice?
No. It is a habit tracker, and nothing in it comes from a licensed professional. Talk to a doctor before starting anything that could affect your health.