The habit app for people who don't want a habit app.
Three Lights is a minimalist habit app built around the only number that actually changes a life: three. Three habits, once a day, one honest light each — green, yellow, or red. No XP. No leaderboards with strangers. No 47-field check-ins. Just the daily moment of reflection you've been trying to build.
Why 3 habits beats 30
Most habit-tracking apps assume the problem is data. It isn't. The problem is that you skipped today. Tracking 30 habits is a great way to feel productive for two weeks and then quit forever. The research on habit formation — Wood, Clear, Fogg — converges on the same answer: pick a tiny number, anchor it to an existing routine, do it daily.
Three Lights bakes that constraint into the product. The free plan gives you four wellbeing habits: eat, drink, move, sleep. That's it. You reflect once a day, you tap the light that's true, and you close the app. The whole interaction takes ten seconds.
What you actually get
- One green / yellow / red light per habit, per day. Honest, not perfect.
- Streaks that reset gently — missing a day isn't a punishment.
- Four ready-made wellbeing habits, free, forever.
- Private Groups (Pro): build shared habits with partner, family, or close friends.
- Custom habits (Pro): so the habits in your Group actually fit your life.
- No ads. No social-style feed. No notification spam.
How it works in 10 seconds a day
- Open the app once a day — usually evening.
- For each habit, tap green (yes, did it), yellow (sort of), or red (no).
- That's it. Your streak updates, your history fills in, you close the app.
Who this app is for
You tried Habitica and quit because it felt like a second job. You tried Streaks and felt punished every time you missed a day. You tried Notion templates and forgot about them after a week. You want something that takes 10 seconds, holds you accountable to the people who actually know you, and doesn't shame you when life happens.
Pricing
Free for the four wellbeing habits, solo. $2.99 / month for Pro: private Groups, custom habits, unlimited habits, email invites, no ads. 7-day free trial, cancel anytime, 30-day money-back guarantee.