Block periodization
Block-periodized program built around your goal and meet date
Next set.
How much?
Finish a set, log how hard it was, and FitBoost works out your next weight. Your workout records are free, with no cap.
In-workout coachPRO
Every set resets the weight for the next one.
Log the effort
Finish a set and pick how many more reps you had left. Your next set's weight changes right away.
Rest that fits
The harder that set was, the longer you rest. A notification calls you back.
Knows when you're done
When fatigue starts costing you reps, it tells you to call it a day. The more you train, the better it learns your own stopping point.
Routine auto progressionPRO
Hit your reps and it goes up. Miss and it waits.
Start a routine and today's weights and reps come from your last sessions. Miss twice in a row and it eases off; come back from a long break and it starts you gently. Each kind of equipment uses its own step.
- Hit the target, go up
- Missed, hold
- Missed twice, ease off
Recovery map
See what's still recovering, right on your body.
Recent effort and time since each session show how recovered each muscle is. On days you'd hit something still sore, the home screen tells you first.
0Hafter leg day
- Fatigued
- Recovering
- Recovered
Pain notesLog where it hurts and the lifts that use that muscle get lighter, with substitutes suggested.
Movement assessmentFree
Your phone’s camera measures how you move.
Stand your phone up and move in front of the camera to measure mobility, fitness, jumps, bar speed and running form. Video is processed only on your device.
Raising your arm forward (shoulder flexion). The angle between the trunk line (dotted) and the arm line.
- Stronger side
- Side to watch
Measure
Follow the on-screen and voice cues to measure joint angles, jump height, bar speed and running landing. The front camera works too.
See
Joint points and angles are drawn on the figure to show which side is weaker, with measurement error, change since last time, left–right difference and research ranges with sources.
Adjust
Warm-up drills for the weaker side are suggested for that day’s workout, and you’re reminded when it’s time to retest.
Each test shows a plain name with the technical term underneath. It doesn’t replace a medical diagnosis; if you have pain, see a professional.
Plate math
See exactly what goes on each side.
Add your bar and the plates you own to see what to load and in what order. Suggested weights snap to loads you can actually build. Try it.
142.5KG
PRO+ coaching
It plans your training block and sets each day’s weights.
Everything in PRO, plus a program built around your goal and meet date, with weight and sets adjusted day by day.
Daily readiness
Daily intensity tuned to sleep, soreness, stress and HRV
In-session autoregulation
Back-off loads adjusted on the spot from your top-set RPE
Deload suggestions
Deloads suggested from performance and fatigue trends
Weekly sets per muscle
Weekly sets per muscle against MEV and MRV
Nutrition targets
Calories and macros that adapt weekly to your weight trend
Warm-up auto-fill
Fills in warm-up steps to match your working weight and your bar.
Other features
Build a program
Pick your goal, experience, days per week, session length and equipment, and get a weekly plan saved as routines. Muscles you want to rest are left out; the ones you want to grow get more work. Set a training goal such as strength, hypertrophy, or fat loss, and the starting choices follow it.
Strength balancePRO
Compares your five big lifts against typical ratios and adds a set or an accessory where one lags.
Cardio calories
Fill in calories and distance from treadmill speed and incline, or erg pace and watts. In a past workout, just change the time or distance and calories fill in.
Treadmill · 6.5 km/h · 8% incline · 30 min
Warm-ups, drops, back-offs and supersets
Plan warm-up sets apart from working sets, and get suggested weights and reps for every drop and back-off set. Pair two exercises as a superset, and log planks in seconds.
Reports for your trainer
Pick a date range and send a workout report. Trainers keep each client's log separate.
Running mode
One two-way button at the top of Home turns the whole app toward running. Track runs on your phone, Apple Watch, Galaxy Watch or Garmin, and one reference result sets your pace zones and predicted times. A single run is kept within 110% of your longest in the last 30 days, and the weekly running plan (PRO+) turns a quality run the day after legs into an easy run.
My courses
Courses gather on the running Home, nearest first. Save a run as a course in one tap and send it to a friend right away. Running the same route twice also makes a course to race your past self on, and you can draw one on the map or import GPX or TCX. Scan a friend's course QR code in the app, and share with no server. For courses made from a route you ran, the start and finish areas are hidden at random when you send.
Estimated 1RM
Completed sets of 12 reps or fewer go through Epley, Brzycki and Lombardi, and we take the median. Log RIR and it gets sharper.
Sync across devices
No sign-up needed. iCloud or Google Drive keeps your devices in sync, for free.
kg and lb
Set one unit for the whole app, or a different one per exercise.
Sharing and customizing
Turn runs and strength workouts into cards sized for Instagram stories and post them straight away. Like an Instagram story, drag and type right on a full-screen canvas, and drop stickers on the bin to delete them. 26 ready-made layouts fill in with this record, and you can add word chips, speech bubbles, location pins and photo stickers, pick a font and color for each number, unit and label, and tuck stickers behind the person in your photo. Runs exported as GPX or TCX from other apps come in too, and cards save straight to Photos. Photos are processed only on your device, and routes are drawn with the start and finish hidden.
22 fonts
Set per number, unit and label. All under the Open Font License.
Watch
Finish the set on your wrist.
Finish a set and pick the effort. The rest timer starts, and a tap on your wrist says when it's time to go. Timed moves like planks show in seconds, and you can adjust them right on the watch.
Exercise library
1,690
All 1,690 exercises come with a picture and a guide.
Each one covers setup, steps, breathing and precautions. Filter by muscle and equipment, with functional moves like burpees and man makers included.
Pricing
Logging is free, with no limit.
Your history is what the math runs on, so logging is never locked. PRO takes that history further.
Free
$0
- Unlimited workout records
- 1,690 exercises with guides
- Recovery map and pain notes
- Program builder
- Drop and back-off sets with a set plan
- Plate calculator
- Device sync and backup files
- Run tracking, pace zones, my courses
- Share cards, editor layouts, stickers and saving to Photos
- Movement assessment tests, results and result cards
- 3 routines, 5 custom exercises
PRO
$2.99/mo or $22.99/yr
Everything in Free, plus
- In-workout coach
- Routine auto progression
- Targets that learn from you
- Strength balance fixes
- Plateau alerts and gym-ready loads
- Personal 1–15 rep load curve
- Weekly coaching report
- Unlimited routines and exercises
- Run analysis, structured runs, race-day mode
- Assessment results applied to your plan, video replay
- Pro editing, 22 fonts, my templates
PRO+
$5.99/mo or $44.99/yr
Everything in PRO, plus
- Block-periodized program
- Daily intensity tuned to readiness
- Back-off loads adjusted mid-session
- Deload suggestions
- Weekly sets per muscle
- Plan and auto-fill warm-up sets
- Nutrition targets
- Weekly running plan around strength recovery
- Day-of adjustments from jump readiness, in-set bar speed cues
- Share cards ready from your template when you finish
Subscriptions are billed through your Apple or Google account and can be canceled in the store at any time. Prices shown are in US dollars; the price in your store's purchase sheet applies.
Start with
today's set.
No sign-up. Use it in Korean, English, Japanese, Simplified Chinese or Traditional Chinese.