About
Peak Fettle is a small, independent maker of iPhone apps for training, attention, nutrition and mobility.
The suite
Four apps, one account and one Pro subscription. Peak Fettle is on the App Store; the others follow it.
- Peak FettleOn the App Store
- A workout tracker that turns every set into an estimated one-rep max and a percentile rank.
- LifeOSIn App Review
- Screen time, habits and goals, so your time goes where you want it to.
- FuelIn development
- Nutrition tracking for people who weigh their food and want to know where each number comes from.
- LimberIn development
- Short, guided mobility and balance sessions you can follow without looking at the screen.
How the apps are built
Numbers you can check
Your estimated one-rep max comes from the Epley formula. Your percentiles are calibrated to published strength standards and adjusted for sex, bodyweight, age and years trained, and the app says how it got there.
Your data on your phone
On the free plan your workout log is stored on your iPhone and works offline. Pro also keeps it on our server so it follows you to a new phone. Each app says plainly what leaves the device.
Weekly streaks
Streaks are counted in weeks, not days. A week counts when you log one session, a rest day or cardio, and the week you are in never counts against you until it is over.
No ads
There are no adverts in the apps and no advertising trackers. Pro is how the work is paid for.
Who makes it
Peak Fettle is built by an independent developer. Questions, bug reports and requests all reach the same inbox: admin@peakfettle.app.