Fortior
For lifters
Fortior suggests the weight for each lift from your recent sets of it, aimed at the reps and effort your plan calls for and rounded to a step you can load. Tap a suggestion to see why.
You warm up, glance at last week's numbers and pick a weight. Too light and a set is wasted. Too heavy and the reps fall apart. Fortior does that math from the sets you already logged, so you start close to the right weight and spend your effort lifting it.
Fortior suggests each weight from your recent sets of the same lift, aimed at the reps and reps in reserve your plan calls for. It rounds to a step you can load: 2.5 kg (5 lb) for most equipment, 5 kg (10 lb) for machines. Tap a suggestion to open "Why this weight?".
Run one of eight preset programs, build your own templates, or log freely. Bench taken? Substitute a similar exercise mid-workout, ranked by movement and muscles. Your workout follows you to the Lock Screen and Apple Watch, where you can complete a set.
Enter reps in reserve on each set: how many more good reps you had left. Zero means failure and a blank means you didn't track it, and Fortior never mistakes one for the other. Where a calculation needs a number, a blank counts as two.
Fortior estimates your one-rep max from the weight, reps and reps in reserve of sets you already log, so you can follow your strength without a test day. Push-ups and pull-ups are measured relative to your bodyweight, so a cut doesn't read as getting weaker.
Hard sets per muscle each week show what your training actually covers. A hard set has at least five reps and at most three in reserve. Main muscles get a full set and helper muscles get half.
Highlights celebrate only real wins: a heavier lift, a higher estimated max, more reps at the same load. A first attempt is a baseline, not a record. Every workout you finish gets a recap.
A Deload suggested card appears on Today only when several signs of fatigue line up, such as falling lifts, sets feeling harder than planned, lower HRV or short sleep. It never changes your program on its own.
Workout logging with suggested weights, templates, eight preset programs, the full exercise library, your complete history and export.
Advanced analytics such as weekly hard-set comparisons, Ask Fortior answers about your lifting, AI explanations after workouts, and more program options. Plans and prices appear in the app.
No. Fortior estimates it from the weight, reps and reps in reserve of the sets you log, using sets where reps plus reps in reserve lands between 1 and 11. It's an estimate, not a tested max, and how honestly you rate your sets moves it.
Yes. Run one of the eight preset programs, build your own templates, or follow a plan from your coach. Suggestions come from your recent sets of each lift and need a planned rep range, which any program or template gives an exercise.
Pull-ups, dips and push-ups log reps with an optional added or assistance load. Fortior divides your estimated max total load by your bodyweight, shown as a multiple such as 1.24× BW, so losing weight doesn't look like losing strength. It needs a bodyweight on record.
Pick pounds or kilograms in Settings. Suggestions are rounded once, in your unit, to the usual step for the equipment: 2.5 kg (5 lb), or 5 kg (10 lb) on machines. Gym and equipment profiles, under detailed training controls, can hold your plate pairs and rounding step.
Yes. In Settings → Data → Import training history, choose your CSV. Fortior shows a preview before anything is saved, and sets from the past year can feed your suggested weights. Strong and Hevy are names of their respective owners, and Fortior is not affiliated with them.
Yes. Logging, your history and workout suggestions work offline. Cloud sync, hosted AI and provider imports wait for a connection.
No. Suggestions and estimated maxes are estimates from your own logs. Adjust a weight when a set is clearly too light or too heavy and log what you actually lifted; the next suggestion updates from it. Fortior is not medical advice.
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