Peak Fettle
On the App Store
Log a set in a few taps. Peak Fettle works out your estimated one-rep max from every working set, ranks you on 51 lifts against published strength standards, and keeps a streak that is counted in weeks, not days.
- Fast set logging
- Supersets, drop sets, warm-ups, RIR or RPE and a rest timer. Cardio goes in the same log.
- An estimated 1RM from every set
- Worked out with the Epley formula from your working sets, so you never have to test a max.
- Percentiles on 51 lifts
- Calibrated to published strength standards and adjusted for sex, bodyweight, age and years trained. Worked out on your phone.
- Strength tiers
- Nine tiers, set by where your squat, bench press and deadlift rank.
- Weekly streaks
- A week counts when you log one session, a rest day or cardio. The week you are in never counts against you until it is over.
- Groups
- Train with 2 to 12 people towards a shared weekly goal and keep a streak together. You choose how much members can see.
- Routines and plans
- Start from Push/Pull/Legs or Upper/Lower, or generate a plan on your phone from your schedule and equipment.
- Exact weights
- Type 82.5 kg and 82.5 kg is what is stored. Kilos or pounds, with a plate calculator.
- Widgets and Live Activity
- A Live Activity rest timer with +15 s and Skip, Home and Lock Screen widgets, and Siri shortcuts.
- Apple Health
- Reads sleep, resting heart rate, HRV, steps and bodyweight, and writes your finished workouts back.
- Import from Strong and Hevy
- Import your workouts from Strong or Hevy in one step.
- Exercise detail
- Record grip, attachment, stance, bench angle or pulley ratio when it matters to you.
Your data. 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.
What sets it apart
- 51Lifts with a percentile, not just the big four
- The squat, bench press, deadlift and overhead press are ranked directly. 47 variations are ranked through a measured ratio to their parent lift: 21 bench press, 15 squat, 6 deadlift and 5 overhead press variations.
- 13Kinds of exercise detail
- Grip width, attachment, stance, bench angle, pulley ratio and more, mapped across 241 exercises. The plate calculator handles 1:1, 2:1, 1:2 and 4:1 cable pulleys as well as barbells.
- 186.7lb typed is 186.7 lb stored
- Weights are stored exactly as you type them, in the unit you typed. Nothing is rounded to the nearest plate or changed by converting between kilos and pounds.
- £0For the whole log
- No caps on logging, routines or history on the free plan, and the log is stored on your iPhone. Importing from Strong or Hevy is free too.
- 2–12People in a group
- Set a weekly goal of 1, 2 or 3+ workouts and keep a streak together. Choose Private, Standard or Transparent for how much members see. You can be in up to 3 groups.
- 1Session a week keeps a streak
- Streaks count weeks, Monday to Sunday. A rest day or imported cardio also counts, and a streak only ends after a whole week with nothing logged.
- +15 sFrom the Lock Screen
- A Live Activity rest timer with +15 s and Skip, Today, Week, Streak and Custom widgets, and Siri shortcuts to log a set, start a workout or start a rest.
How the ranking works
Every working set gives an estimated one-rep max. Your best on each lift is compared with published strength standards, adjusted for your sex, bodyweight, age and years trained.
The model runs on your phone, so a new best is ranked the moment you log it. If you would rather not give your sex, a blended scale is used. Percentiles stop at the 99th, and a set that looks like a typo is checked before it can move your rank.
- Push press of overhead press1.30×
- Trap bar deadlift of deadlift1.05×
- Paused squat of squat0.92×
- Close-grip bench of bench press0.90×
- Front squat of squat0.85×
- Romanian deadlift of deadlift0.82×
- Incline bench of bench press0.78×
So a 100 kg front squat is ranked like a 117.6 kg back squat (100 ÷ 0.85).
| Tier | From percentile |
|---|---|
| Iron | start |
| Stone | 30 |
| Bronze | 50 |
| Silver | 70 |
| Gold | 85 |
| Platinum | 93 |
| Diamond | 97 |
| Elite | 99.3 |
| World Class | 99.9 |
How it compares
Peak Fettle against the trackers people usually weigh it against. Boostcamp has far more ready-made programs and Fitbod adjusts workouts for you; Peak Fettle is the one that ranks your strength and keeps the whole log free.
| Peak Fettle | Hevy | Strong | Boostcamp | Fitbod | |
|---|---|---|---|---|---|
| Free plan | Yes: Full log, routines and history | Partly: 4 routines, about 3 months of graphs | Partly: 3 routines, charts in Pro | Yes: Programs, tracking, plate calculator | No: Trial only |
| Ranks your strength | Yes: Percentiles on 51 lifts, free | No: Not offered | No: Not offered | Partly: 0–100 score, Pro only | No: Not a focus |
| Where your log is kept | Yes: On your iPhone (free plan) | Partly: Offline logging, cloud sync | Partly: Offline capable, cloud sync | No: Cloud | No: Cloud |
| Ready-made programs | Partly: 3 starter programs and a plan generator | No: Routines only | No: Routines only | Yes: 11,000+ community programs | Yes: Generated workouts |
| Plans that adjust | Partly: Rule-based generator; in-depth builder in Pro | No: Not offered | No: Not offered | Partly: Coach-written programs | Yes: Recovery-aware programming |
- Included
- Limited or paid
- Not offered, or cloud only
Peak Fettle’s free plan has no time limit. Fitbod has no free plan.
Competitor plans and US App Store prices checked August 2026 (sources listed in the site’s data file); prices vary by region and change over time. Full comparison, including Caliber, Apple Fitness+ and Whoop
Free, or Pro
Free
£0
The whole log, ranks, streaks, groups and widgets.
Pro
£6.99 a month, or yearly
The in-depth plan builder, recovery insights, server backup and LifeOS.