1
Plant a habit
Pick something small and how many days a week. A catalog of ideas helps: running, a language, reading, a tidy home.
Culm
Grow slow.
Then grow tall.
A habit tracker that grows like bamboo. Each habit is a stalk: the first three weeks grow roots, then every week you keep adds to it. Miss a day and it bends. Nothing you have grown is ever taken away.
Coming soon to iPhone and Android
Free for up to 3 habits. The Grove plan has 14 days free on yearly.
Moso bamboo spends years underground before it rises.
Your habits get the same patience.
2
Root for 21 days
For three weeks nothing shows above ground. Every check-in grows the roots instead, and there is nothing to lose yet.
3
Grow a week at a time
Once rooted, every week you keep adds a segment. Months of practice become something you can see.
Bend, don’t break.
Bamboo survives storms because it gives. Every habit gets two bend days a month. Use one on purpose for a sick day or a long flight, or let Culm spend one for you when a week would otherwise slip.
A week is the unit
Three days a week is a kept week whichever days they are. No daily chain to protect.
Growth never resets
A quiet week grows nothing, and takes nothing. Every kept week stays in the stalk for good.
Morning run · this week
Mo
Tu
We
Th
Fr
Sa
Su
Wednesday was a bend day. The week is kept, and one bend day is left this month.
Weeks and seasons, not days
A calm tracker for habits you want to keep for years.
Watch it climb
Each habit has its own page: the whole stalk rising through grass, clouds and, after two years, the stars.
Today, in the order you live it
Morning habits first, checked ones settle at the bottom. Swipe a row to log yesterday or use a bend day.
Start small, from a good idea
Eight categories of habits to begin with, each with a pace that is easy to keep. Or write your own.
Grow side by side
Start a grove with up to seven friends. Everyone brings their own habit and pace; nobody is ranked.
A grove is connected underground
Start a shared grove with friends working on the same thing. You see each other’s stalks and how this week is going. Never missed days, never a ranking, never what anyone else is growing.
Send sunshine. Once a week you can send someone a warm “keep going”. No words, no replies; it shows as a small sun beside their stalk.
Joining a grove is always free. Up to eight people in each.
Start free. Grow when you’re ready.
Seedling
Free
- Up to 3 habits at a time
- Every growth rule: rooting, bend days, kept weeks
- Join shared groves
The Grove plan
14 days free on yearly- As many habits as you like
- Sync across your phones
- Full history and CSV export
- Start shared groves
Yearly
$29.99
a year
Monthly
$4.99
a month
Lifetime
$79.99
once
US prices; your store shows the local price. Subscriptions renew until cancelled in your App Store or Google Play settings. Terms
Your habits are yours
Culm uses what you enter only to grow your stalks and keep them safe.
- Your phone first
- Culm works fully without an account. Your habits only leave the phone if you sign in to sync or join a grove.
- One standard, everywhere
- Wherever you live, you get the same protection and the same rights, built to the EU’s GDPR and US state privacy laws.
- Encrypted, in one place
- Synced data is encrypted in transit and at rest, kept in Google Cloud’s EU region, and readable only by your account.
- Never sold or shared
- No ads, no analytics tools, no data brokers. Download a copy of your data or delete your account from the app.
Plant the first one today.
Three weeks from now it will have roots. A year from now, a stalk you can stand next to.
Coming soon to iPhone and Android