The gym tracker that tells you
what to lift next.
A complete gym tracker: 30 ready programs, one-tap set logging, 1RM and PR charts, heart-rate zones and 870+ exercises. And for every set, kach suggests the next weight and reps. Free, no account, works offline.
Everything you'd track in a spreadsheet, done for you
Progression, rep counting and deep analytics that usually sit behind a subscription. Free in kach.
Auto-progression
Hit the top of your rep range and kach suggests more weight next time. Stall three sessions in a row and it resets the weight about 10%. One tap to accept, one to change.
Reps counted on your wrist
Apple Watch counts your reps, taps your wrist at the target and ends the set for you. Supersets and drop sets too.
Heart rate and recovery
Live heart rate while you lift, time in each zone, and a Recovery view after the session.
Strength you can see
Estimated 1RM (Epley) trends, PRs on a timeline, weekly sets per muscle against target ranges, and a muscle heat map. Share it all with your coach as a PDF report.
30 ready programs
Full body, upper/lower, push-pull-legs and 4–6 day splits, beginner to advanced. 12 bodyweight programs. Or build your own.
Log a set in one tap
Sets are pre-filled from your plan and warm-ups are generated for you. Supersets, drop, failure and AMRAP sets built in, plus reps in reserve (RIR) in Advanced mode. Rest starts on its own.
Plate math, solved
Tap the weight and see which plates go on each side, for your bar and the plates you own.
Bring your history
Import from Strong, Hevy, Fitbod, JEFIT, FitNotes, StrongLifts or GymGoal. Your PRs and charts are there on day one.
Yours, on your device
No account and no cloud. Works offline. Syncs with Apple Health or Health Connect, and backs up to one file you own.
Also in kach: progress photos with then-vs-now compare · body measurements · lock-screen workout on iPhone · workout reminders · kg & lb · 5 languages
Hit your reps. Add weight.
- Log as usual. Your sets are pre-filled; confirm with a tap.
- kach reads your history. Add reps until you reach the top of your range on every set; then the next session suggests more weight.
- It resets when you stall. Three sessions in a row without progress and kach suggests about 10% less, so you can build back up. After more than four weeks off you restart lighter. Tap “Why” on any number to see the reasoning.
Turn it on once in Settings, or with one tap after a workout. Every number is a suggestion you can change.
Free, private, and made by one person
kach is free to use — no subscription. A short ad plays before you start a workout, never mid-set; that's it. Prefer no ads? A one-time €8.99 purchase removes them for good and supports a one-person project. No feeds, no follower counts, no pressure — just your training. No account. Your data never leaves your phone unless you export it.
Questions, answered
Is kach free?
Yes. kach is free to download and use with no subscription and no paywall. A single short ad plays before you start a workout, never mid-set. That's it. If you would rather not see it, a one-time €8.99 purchase removes ads for good and supports development. It is entirely optional.
Does kach work on Apple Watch?
Yes. The Apple Watch app shows your current set, a rest timer and live heart rate, and it can count your reps for squats, bench press, deadlifts, shoulder press, curls and rows. You can log a full workout without your phone.
Does kach work offline?
Yes. Your routines and history live on your device, so kach works fully offline — no connection required to plan or log a session.
Do I need an account to use kach?
No. There is no sign-up and no cloud lock-in. Your training stays on your phone and syncs with Apple Health on iPhone or Health Connect on Android.
Does kach support kg and lb, supersets and drop sets?
Yes. kach works in both kg and lb, and supersets, drop sets, warm-ups and AMRAP are all first-class set types, with a built-in plate calculator.
How does auto-progression work?
Turn it on once. kach suggests each set's weight and reps from your last sessions: more weight after you hit the top of your range, and a lighter restart after three sessions without progress or a break of more than four weeks. Every number is a suggestion you can change.
Does the Apple Watch count my reps?
Yes, for squats, bench press, deadlifts, shoulder press, curls and rows. Turn it on in Profile; the watch taps your wrist when you reach the target.
Can I bring my history from another app?
Yes. kach imports exports from Strong, Hevy, Fitbod, JEFIT, FitNotes, StrongLifts and GymGoal, with your PRs.
Is kach on Android?
Yes, on Google Play, with Health Connect sync. The watch app is Apple Watch only for now.
What happens to my data if I change phones?
Export a backup file and open it on the new phone. Everything comes back, photos included.
Your next session is already planned.
Download kach, pick one of 30 programs or import your history, and let the next session's numbers come to you.