Rest Timer
Auto-starts the moment you check off a set. 30, 60, 90, 120, 180, or 300 seconds — or whatever you used last time.
Built for people who already lift
A Workout Tracker With Nothing In The Way
Weight, reps, done. Kraft is lean, fast and quiet enough to use with a bar in your hands. No coach. No AI. No videos. No streaks. No feed. You know what you're doing — this is the notebook, not the trainer.
First three workouts free · Syncs across your devices via iCloud · No account · One payment, no subscription
Illustrative UI — not final screenshots
Everything You Need to Log a Workout, Nothing You Don't
Log a set, hit rest, move to the next exercise. That's it — that's the app.
Tap to mark a set complete and the rest timer starts on its own. Pick 30, 60, 90, 120, 180, or 300 seconds, or let Kraft remember what you used last time. Warming up under a heavy bar? The built-in calculator works out your ramp-up sets so you're not doing plate math between reps.
No coach. No AI. No form videos. No streaks to keep alive. No workout of the day. Kraft has no opinion about your programme and will never suggest one — you already know what you're doing, and this is where you write it down.
Set Logging
Weight, reps, and a checkmark. Warm-up, drop set, and failure sets tag in one tap.
Warm-up Calculator
Enter your working weight. Kraft works out the ramp-up sets so you're not doing plate math between reps.
Your Units, Your Call
Kilograms or pounds, switched anywhere in the app. Every chart and total follows.
60+ Exercises, Routines, and Progress You Can Actually See
Browse a library of 60+ exercises filtered by muscle group, or add your own in seconds.
Start from six pre-built routines — Push Day, Pull Day, Leg Day, Upper Body, Full Body, Arms — or build a custom one exercise by exercise. Every lift tracks its own weight, volume, and estimated 1RM over time, charted so progress is something you see, not something you hope is happening.
Exercise Library
Every Lift, Already In There
60+ exercises out of the box, filtered by muscle group and searchable as you type. Missing something? Add it in seconds and it behaves like every other exercise.
- Filter by muscle group
- Barbell, dumbbell, cable, machine, bodyweight
- Add unlimited custom exercises
Illustrative UI — not final screenshots
Routines
Six Templates, Or Build Your Own
Push, Pull, Legs, Upper Body, Full Body, Arms — ready to run on day one. Build your own from any exercise, group them into supersets, and reorder by dragging.
- Six pre-built routines
- Custom routines and supersets
- Drag to reorder mid-workout
Illustrative UI — not final screenshots
Progress
Proof You're Getting Stronger
Weight, volume, and estimated 1RM charted per exercise, session by session. Personal records surface on their own — you don't have to go looking for them.
- Weight and volume progression charts
- Estimated 1RM (Brzycki and Epley)
- PRs detected automatically
Illustrative UI — not final screenshots
Your Training Log Belongs to You
No sign-up. No email. No password. Open Kraft and start logging — there is no Kraft account, because there is no Kraft server.
Your history lives on your iPhone and mirrors into your own private iCloud database, so an iPad or a new phone picks up exactly where you left off. That is Apple's iCloud, under your Apple ID, not a company database with your name in it.
Want it in Apple Health too? Turn on sync. Signed out of iCloud entirely? Everything keeps working, offline, on the device.
And if development stops, nothing stops. There is no service to switch off and no account to expire, so the app on your phone keeps working exactly as it does today — with your history readable and exportable, whether or not another update ever ships.
- No account required
- Syncs through your own iCloud
- Works offline
Kraft vs. Strong and Hevy
There are good workout trackers already. Kraft keeps what you touch every session and drops the rest — that's the whole design. The rows where it loses are still in the table.
| Feature | Kraft Buy once | Strong | Hevy |
|---|---|---|---|
| What it costs | €19.99one payment | Subscription | Free tier + subscription |
| Core set & rep logging | Yes | Yes | Yes |
| Exercise library | Yes | Yes | Yes |
| Custom routines & supersets | Yes | Yes | Yes |
| Rest timer | Yes | Yes | Yes |
| Progress charts & 1RM | Yes | Yes | Yes |
| Apple Health sync | Yes | Yes | Yes |
| Works with no account | Yes | No | No |
| Data on your device and your iCloud, not a vendor's server | Yes | No | No |
| No ads | Yes | Yes | No |
| No subscription, ever | Yes | No | No |
| Cross-device cloud sync | Yes, through your own iCloud | Yes | Yes |
| Social feed & sharing | No | No | Yes |
| Apple Watch app | No | Yes | Yes |
Kraft is an independent app and is not affiliated with, endorsed by, or associated with Strong (strong.app) or Hevy. Comparison reflects publicly available information about each app's free tier as of 2026 and may change.
What Lifters Say
Three of the people who trained with Kraft before it shipped.
“Finally an app that's not overloaded. Just the numbers, progressive overload tracking, and nothing else. Perfect for just training.”
“I've tried many cluttered trackers out there. This one is clean, fast, and built for people who actually lift. No fluff, just results.”
“I need precision, not gamification. This tracker does exactly what it should — nothing more, nothing less. And beautiful design.”
Log Three Workouts. Then Decide.
The first three are free. After that it's €19.99 — one payment, one time, no subscription and no tier above it.
If you decide against it, the workouts you logged stay readable and exportable. Nothing you recorded is held behind the purchase.
Get Kraft — €19.99One-time purchase · No account · iOS 26.2 or later
Frequently Asked Questions
Is €19.99 really a one-time payment?
Yes. One payment, once. There is no subscription, no annual renewal, and no higher tier to upgrade to later. Kraft is a workout log, not a service — it doesn't cost anything to run, so it isn't rented to you.
Do I lose my history if I don't buy?
No. The first three workouts are free. After that you need to buy Kraft to log new ones, but every workout you already logged stays readable and exportable whether you pay or not. Your training history is never held behind the purchase.
What happens to my data if you stop working on Kraft?
Nothing. There is no server to shut down and no account to deactivate, so the app on your phone keeps working exactly as it does today. Your history stays on the device and stays exportable, with or without further updates.
Where is my workout data stored?
On your iPhone, and — if you are signed in to iCloud — mirrored into your own private iCloud database so your other devices see the same log. There is no Kraft server and no Kraft account: the data belongs to your Apple ID, not to us.
How does sync work?
Through CloudKit, in your own private iCloud database. Start a workout on your iPhone, open Kraft on your iPad, and the sets are already there. There is still nothing to sign up for — Kraft uses the Apple ID your phone is already signed in to, and there is no server of ours in the middle. Signed out of iCloud? Everything keeps working locally.
Do I need to create an account to use Kraft?
No. There is no sign-up, no username, and no password. You open the app and log a set.
Does Kraft work with Apple Health or Apple Watch?
Kraft saves each finished workout to Apple Health (type, start time, duration) so other apps can see when and how long you trained. It does not read body weight or vitals from Health, and there is no Apple Watch app.
What's different about Kraft compared to Strong and Hevy?
Kraft is a logger, not a coaching platform. No coach, no AI, no video library, no streaks, no social feed, no workout of the day — nothing between you and the set you are about to write down. What it does have: a 60+ exercise library, six pre-built routines plus custom routines with supersets, a configurable rest timer (30–300 seconds), a warm-up calculator, 10 types of body measurements, progress charts covering weight, volume and estimated one-rep max using the Brzycki and Epley formulas, and sync across your devices through your own iCloud. It also costs €19.99 once instead of a subscription.
Privacy Policy
Last updated August 29, 2026.
The short version
Kraft has no server, no account, no analytics, no advertising and no third-party SDKs. It collects nothing and sends nothing anywhere, except the data you explicitly turn on below. There is no one to sell your data to and no company database it could sit in — it is on your phone.
What data exists, and where it lives
Your workouts, routines, exercises, notes, body measurements and settings are stored on your iPhone using Apple's on-device database (SwiftData). Kraft has no backend, so this data never leaves your device on its own.
iCloud sync (optional)
If you're signed in to iCloud, Kraft mirrors your data into your own private CloudKit database, under your Apple ID, so your other devices stay in sync. That storage is Apple's iCloud, governed by Apple's own privacy terms — we (RK Holding GmbH und Rico Klatte RiCharge GbR) have no access to it, no copy of it, and no way to read it. Turn sync off in Settings and it stops; nothing is deleted from your device.
Apple Health (optional, write-only)
If you grant permission, Kraft saves each finished workout (type, start time, duration — no calorie estimate) to the Health app, so other apps you use can see when and how long you trained. Kraft never reads anything back from Health.
Payment
The one-time €19.99 unlock is billed and processed entirely by Apple through the App Store. We never see or store your payment details — Apple handles that the same way it does for every app.
Tracking, analytics, advertising
None. No analytics SDK, no crash reporter phoning home, no ad network, no tracking of any kind — Kraft's own Apple privacy declaration (its "privacy manifest") states this formally: no data collected, no tracking.
Exporting and deleting your data
Export your full workout history as a CSV any time from Profile → Settings → Export Data, through the standard iOS share sheet — you choose where it goes. To delete your data, delete it in-app, or delete the app itself, which removes everything stored on the device. If you've used iCloud sync, remove the iCloud copy from Settings → [your name] → iCloud → Apps Using iCloud, or contact us and we'll walk you through it.
Children
Kraft is not directed at children and does not knowingly collect data from anyone — including children — because it does not collect data from anyone, full stop.
Changes to this policy
If this ever changes — say, a future feature adds a new kind of data — this page will be updated and the date at the top will change. We won't add tracking or a server silently.
Contact
Questions, support, privacy requests, bug reports — one address, a real person reads it.