鍛錬TANREN Free habit tracker

Stack the days. Grow the tree.

FreeNo sign-upAdd to Home ScreenHealth & fitness

Tanren (鍛錬, Japanese for discipline) is a free habit tracker with no sign-up. Every habit you do waters a bonsai tree. Do them all and it's double. Skip too long and it dries out — 7 days and it dies. Weight graph with a goal-date forecast, a lifting log, home workouts and 30-day challenges — all in one.

Start free (no sign-up)

Unlimited habits30 seconds to startWorks offlineCrew never sees your weight

Every habit you do waters a bonsai tree
Every habit you do waters a bonsai tree
Weight graph and the day you hit your goal
Weight graph and the day you hit your goal
Log sets in a few taps. Rest timer and PRs
Log sets in a few taps. Rest timer and PRs
Grown trees and dead ones both stay in your Garden
Grown trees and dead ones both stay in your Garden
All done. A crew of up to 8 (weight stays private)
All done. A crew of up to 8 (weight stays private)

What it does

FEATURES
01Habits grow a treeOne habit: +1 water. All of them: +2. Seed to sprout, seedling, sapling, tree, great tree, ancient tree. Skip days and it dries; 7 days and it dies. Every tree, grown or dead, stays in your Garden.
02Tap the octagon. Once.Water, a 20-minute walk, stretching — line up your habits as tiles and tap to check. Count habits fill one notch per tap.
03Weight and your goal dateLog with a keypad. Goal line and forecast on the graph, weekly average, BMI, daily calories and protein. kg or lb. Your weight is yours alone.
04Lifting: 56 exercises, sets × repsGym and dumbbell moves with a muscle map. Build today's workout by muscle, time and goal, then log weight × reps per set. Rest timer, last time's numbers, est. 1RM PRs. Logging checks your "Lift" habit automatically.
05Home workouts: 99 moves + timerPick time and focus, get a routine, follow the beeps. When you finish, it logs and checks your workout habit.
06Stack it with a crew (up to 8)Connect with an invite code to see each other's done habits and send claps. Weight, training, goals and trees stay private.
Open the app

Add it to your Home Screen

INSTALL

No app store. Add it from your browser and it opens in one tap like an app — and logs even offline.

iPhone (Safari)

  1. Tap the Share button (□ with ↑)
  2. Choose “Add to Home Screen”
  3. Tap “Add”

Android (Chrome)

  1. Tap ⋮ at the top right
  2. Choose “Add to Home screen” or “Install app”

Coming from TikTok or Instagram

  1. Tap … at the top right
  2. Choose “Open in browser”
  3. Then follow the steps above

Switching phones? Settings → New phone gives you a transfer code. Enter it on the new phone and your logs and crew move over. Your tree and Garden come back from your check-ins.

Home workouts

GUIDES
All 99 no-equipment exercisesHow to do SquatHow to do Wide squatHow to do Pulse squatHow to do Jump squatHow to do Forward lungeHow to do Reverse lunge

FAQ

Is it really free?

Yes. Habit check-ins (no limit on habits), streaks, the growing tree and garden, weight tracking and forecast, the lifting log, home workout timer, 30-day challenges and your crew are all free. No sign-up, no account.

How does the tree grow?

Do at least one habit in a day: +1 water. Do them all: +2. At 1 it sprouts, 5 seedling, 12 sapling, 24 tree, 40 great tree, 60 ancient tree (fully grown). All habits every day: ancient in 30 days. At least one every day: 60 days.

Does the tree die if I miss a day?

No. 1–2 days without water: dry. 3–4: wilting. 5–6: dying. 7 days in a row: dead. Do one habit before then and it recovers. Days with no scheduled habits don't count.

What happens when a tree dies?

Dead trees stay in your Garden, next to the ones you grew all the way. The next time you check a habit, a new seed starts. Your habits, streaks and weight log are never deleted.

Do I need an account?

No. Open it, type a name, and start. When you switch phones, Settings → New phone gives you a transfer code to move everything over.

iPhone or Android?

Both. It runs in your browser — tap "Add to Home Screen" and it opens in one tap like an app, and logs even offline.

Can I use it with friends or family?

Connect up to 8 people with an invite code. You see each other's done habits and streaks and can send claps. Weight, training logs, goals and trees stay private.

Which habits can I track?

Pick from 21 templates (drink 8 glasses of water, walk 20 min, stretch 5 min, in bed by midnight…) and 8 30-day challenges like squats. Or make your own: count habits (8 glasses), habits on set days, and habits you want to cut down.

kg or lb?

Both. Pick kg or lb in Settings. Height in cm or ft/in.

Results are rough estimates from general formulas, not medical advice. If you have a medical condition, are pregnant or breastfeeding, or are under treatment, talk to your doctor before you start.