Watch the reel
Is a crash 3.93× as likely at .08?
Adjusted for age and sex, crash risk vs no alcohol was 2.07× at a breath level of .05, 3.93× at .08, 5.64× at .10 and 12.18× at .15.
Lacey et al., 2016
Streak apps send you back to zero after one bad day.
Unaddicted is an iPhone app for quitting a habit or building one. A slip gets marked on your calendar, and every day you earned before it still counts.
Download on theApp StoreComing soon toGoogle Play
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14days unaddicted
DAILY PLEDGE
Today, I pledge to get unaddicted to alcohol.
HOLD TO COMMITpress & hold
TODAY
How's today going?
HOLD TO CHECK INhold
Tap or scroll the wordmark to switch habits, tap the companion line, and press and hold to pledge and check in. It works like the real Home screen.
What the research in our posts shows
66days, on average, before a new daily habit felt automatic
You were told 21 days. In one study a new habit took 66 on average, and one missed day didn’t undo it.
Lally et al., European Journal of Social Psychology, 2010Read the post →
161minutes a day on the phone with mobile internet blocked, down from 314
Much of the pull is distance. When the feed got harder to reach, screen time fell by half.
Castelo et al., PNAS Nexus, 2025Read the post →
14.7%had quit smoking at 9 to 12 months with cash for each step, against 5.0% without
Habit apps tend to punish the slip. In one trial, rewarding each step nearly tripled the quit rate.
Volpp et al., New England Journal of Medicine, 2009Read the post →
Our posts, with the studies behind them
The feed is full of habit claims with no source. Every post here links the paper, quotes what it says, and tells you where the study falls short.
Watch the reel
Can a family game add 1,661 steps a day?
For the first 12, some families also played a game together: points and levels.
Patel et al., 2017
Off alcohol, can 25 of 34 brain regions thicken?
25 of 34 cortex regions grew thicker, 19 changed faster in the first month, and by 7.3 months 24 matched a group of 45 light drinkers.
Durazzo et al., 2024
Same sugar, fat and salt. Why 508 more calories?
On a mostly ultra-processed menu, people ate 508 more calories a day and gained 0.9 kg.
Hall et al., Cell Metabolism, 2019
One pack a day. What does a year cost?
At the US average of $10.15 a pack, a pack a day costs $3,704.75 a year.
Campaign for Tobacco-Free Kids, 2026
Can testosterone rise 17% after 30 years without training?
After 12 weeks of training, men around 62 who hadn't exercised in 30 years had about 17% more testosterone.
Hayes et al., Endocrine Connections, 2017
What do 3 weeks of beer do to testosterone?
After 3 weeks of beer with dinner, men's morning testosterone was 6.8% lower. Women's didn't change.
Sierksma et al., Alcoholism: Clinical and Experimental Research, 2004
Can one week of 5-hour nights lower testosterone 10–15%?
After a week of 5-hour nights, young men's daytime testosterone fell from 18.4 to 16.5 nmol/L.
Leproult & Van Cauter, JAMA, 2011
After cannabis, 68.6% felt ready to drive. Were they?
90 minutes after cannabis, 68.6% said they'd drive. Their driving hadn't improved.
Marcotte et al., JAMA Psychiatry, 2022
A check-in a day, tools for the hard minutes, and one person in your corner.
Daily check-in
Hold to check in once a day. Each day you do, a square on your calendar turns green. A slip shows in amber, and the rest of your days stay where they are.
30, 60 and 90-day programs
Pick a length and work through it one day at a time.
Tools for the urge
Breathwork, grounding, a delay timer, meditation, sleep, and cold-shower and fasting timers, all in the Tools tab.
A pact with one person
Send one person you trust an invite link. You each pick a goal, the same one or different ones, and see each other’s check-in days. No feed and no crowd. One pact is free.
Your own trackers
Name it, pick an icon, set a target, and log it day by day.
An AI coach, off by default
It’s opt-in. If you switch it on, it gets what it needs about your habits to write its notes, and you can switch it off again in Settings.
Kept on your phone
Your check-ins, journal and photos are stored on your phone. There’s no sign-up. If you start a pact, your goal and check-in days for it sync through our server so your partner can see them.
Lock In
Lock-In is a commitment with no off switch.
It’s a separate mode for when you want more at stake. This is exactly how it works.
- 01It’s opt-in, and it covers one habit at a time.
- 02You choose how long: a number of days, up to 10 years, or for life.
- 03Once it starts, there’s no off switch.
- 04Each day is a pledge and a check-in.
- 05Miss a day and the Lock-In challenge starts again at Day 1. Your real progress on that habit is kept.
- 06Your first Lock-In is free. More need Pro.
One habit is free, for good.
Free
$0
One habit at a time.
- Daily check-ins and your calendar
- Crisis and urge tools, free forever
- One 30, 60 or 90-day program
- Your first Lock-In
Pro Save 58%
$24.99a year
About $2.08 a month, or $4.99 if you pay monthly. Both start with a 7-day free trial.
- Unlimited habits
- Meditation, sleep and fasting tools without limits
- Your own custom trackers
- AI insights, if you switch the coach on
- More Lock-Ins
For life
$99.99once
A one-time purchase. Everything in Pro, for as long as you use the app.
- Pay once, nothing renews
- Every Pro feature
Prices in US dollars. The yearly and monthly plans renew until you cancel them in your App Store settings.