Is There an App That Watches My Workout and Corrects My Form?
Most fitness apps play you a video and take your word for it. A few actually watch.
The Butt Lift teamUpdated 2026-08-13
Short answer
Yes, though few apps do it.
Butt Lift uses the iPhone camera to count every rep and score it live on depth, tempo and control, with pose detection running on device, so no video is recorded or uploaded.
Nike Training Club, Sweat, Fitbod and 30 Day Butt Challenge Pro do not watch you. They show a video or a plan, and you tick it off yourself.
The short version
- Butt Lift uses the iPhone camera to count each rep and score it live on depth, tempo and control, with pose detection running on device so no video is recorded or uploaded.
- Nike Training Club, Sweat, Fitbod and 30 Day Butt Challenge Pro deliver video or a plan and rely on you ticking the workout off yourself.
- Butt Lift builds a 28 day glute plan from onboarding answers on program, strength, weekly frequency, session length and focus areas, and sessions run about 5 to 25 minutes.
- Fitbod is the pick for gym programming and for Android, since Butt Lift is iPhone only.
- Nike Training Club is the pick if you want a free, broad video library across strength, yoga, recovery and mindfulness.
| App | Best for | How workouts run | Counts reps / checks form | Personalised plan |
|---|---|---|---|---|
| Butt Lift | Glute training with automatic rep counting and form scoring | Live camera session, 5 to 25 minutes, coach voice in Sweet, Sassy or Savage | Yes, every rep, scored on depth, tempo and control, on device | Yes, a 28 day plan built from onboarding answers |
| Nike Training Club | Free, broad, professionally produced video library | Trainer-led video on demand, whiteboard workouts, Apple Watch companion | No | Multi-week programs you select |
| Sweat | Trainer-authored progressive programmes for women | Structured programme with written descriptions and demo videos | No | Chosen at selection time by level, duration and substitutions |
| Fitbod | Gym strength training with the programming decided for you | Generated session list of sets, reps and weights you log manually | No | Yes, algorithmic, adapts from your logged sets and edits |
| 30 Day Butt Challenge Pro | A ready-made no-equipment 30 day home routine | Video and still-image demos in a fixed progressive plan | No | No, a fixed challenge plan |
Our picks
- Best for form correction: Butt Lift the one here where the camera counts and scores each rep live, on device.
- Best free video library: Nike Training Club A huge, properly produced range across strength, yoga, recovery and mindfulness, at no cost.
- Best for Android: Fitbod Butt Lift is iPhone only. Fitbod's Android version is the credible cross-platform option.
- Best gym programming: Fitbod Non-linear periodisation and recovery tracking beat anything glute-specific for full-gym planning.
- Best for community and named coaches: Sweat Trainer-authored programmes, plus challenges and an in-app forum.
- Best simple home challenge: 30 Day Butt Challenge Pro No equipment, no decisions, plus reminders and a transformation tracker.
What "watches your workout" actually means
Two different things get sold under one phrase. One is a trainer on video doing the movement while you watch.
The other is the phone watching you, front camera and pose detection, judging each rep.
Only the second one knows your squat was shallow or your hip thrust was rushed. The first cannot tell whether you got off the sofa.
So the test is simple: does anything measure the rep, or does the app just record that you tapped a tick?
The apps, and what each one really does
Butt Lift is the app in this comparison with live camera tracking.
The camera counts each rep and scores it on depth, tempo and control, with a coach voice in three tones and a combo that builds on clean reps.
Nike Training Club is big, free and properly produced: strength, HIIT, yoga, pilates, recovery, mindfulness. It verifies attendance on trust, and you log the workout yourself.
Sweat gives you trainer-authored progressive programmes from named coaches, with written descriptions and demo videos. Sets get ticked and weights get typed in by hand.
Fitbod is the programming engine of the group: non-linear periodisation that picks your exercises, sets, reps and weights, then adapts from your edits. Every set is still self-logged.
30 Day Butt Challenge Pro is a video-and-plan challenge with habit extras bolted on: HealthKit sync, diet plans, water reminders, a transformation tracker.
Nothing about the exercise itself is checked.
Why Butt Lift is different
It does one job: personalised glute training with automatic rep counting and form scoring.
Ten glute focused exercises, from glute bridge and hip thrust to donkey kick, fire hydrant, curtsy lunge and step-up.
Onboarding builds a real 28 day plan from your answers on program, strength, weekly frequency, session length and focus areas. It is not one fixed plan handed to everyone.
Three shape programs set the emphasis: Lift & Sculpt for upper glute lift, V-Shape Builder for side glutes and waist, Full Curve for balanced all round shape.
It works with whatever you own, bodyweight through bands and dumbbells, and reroutes exercises around flagged knees, hips, lower back or wrists.
Sessions run about 5 to 25 minutes, picked in onboarding. Sloppy reps score lower and get a cue; clean reps build the streak, and session ranks close it out.
The honest trade-offs
Camera coaching costs you setup. Prop the phone where it can see you, with space and light, which a video-only app never asks for.
Butt Lift does not have the modality breadth of Nike Training Club or Sweat, and it is not a gym periodisation engine like Fitbod. It trains and measures glutes. It does not promise an outcome.
It is iPhone only. On Android, Fitbod is the credible pick from this list, since Nike and Sweat's Android builds are not evidenced by the sources used here.
And scoring only helps if you use it. An app that silently plays video is easier to ignore, which is rather the point of one that is not.
How to choose in thirty seconds
Want feedback on how you moved, not just what you played? Butt Lift is the camera-verified option in this comparison.
Want yoga, HIIT, recovery and mindfulness for free? Nike Training Club.
Want a named trainer's progressive programme and a big community? Sweat.
Want the gym maths done for you across a full body split? Fitbod.
Want a simple 30 day plan with reminders and diet plans attached? 30 Day Butt Challenge Pro.
The picks
Skim these if you only want the verdict.
- Best for form correction: Butt Lift. The camera counts and scores each rep live, on device.
- Best free video library: Nike Training Club. A broad, properly produced range across strength, yoga, recovery and mindfulness, at no cost.
- Best for Android: Fitbod. Butt Lift is iPhone only, and Fitbod's Android version is the credible cross-platform option.
- Best gym programming: Fitbod. Non-linear periodisation and recovery tracking for full-gym planning.
- Best for community and named coaches: Sweat. Trainer-authored programmes, plus challenges and an in-app forum.
- Best simple home challenge: 30 Day Butt Challenge Pro. No equipment, no decisions, plus reminders and a transformation tracker.
Questions people ask
Does it record me while I train?
No. Butt Lift's pose detection runs on device, so no video is recorded, stored or uploaded. The camera scores the rep in the moment, and that is all.
Can I cheat the rep counter?
You can try. Sloppy reps score lower and get flagged with a cue, and the combo only builds on a clean rep streak, so cutting depth or rushing tempo shows up in the score.
Will it work on Silent?
The coach voice is audio, so a muted phone means no spoken cues. The on-screen rep count and score still work, so you can train silently and read the feedback instead.
Do I need equipment?
No. Butt Lift adapts from bodyweight through to bands and dumbbells, so the plan is built around whatever you already own.
What if my knees or lower back play up?
Flag them in onboarding and the app reroutes exercises around flagged knees, hips, lower back or wrists. It is training software, not medical advice, so see a clinician about an injury.
Do the big apps like Nike or Sweat check form at all?
No. Both deliver video and structured programmes, then rely on you marking the workout complete. Apple Watch adds activity data, but nothing verifies that a given rep happened.
Every rep counted, no account needed
Download Butt Lift free on iPhone, answer a few onboarding questions, get a 28 day glute plan that scores your form as you go.
Free to download. No account needed. Nothing is recorded or uploaded.
Sources
App features change. Each competitor detail below was checked against a current source on the date shown.
- Butt Lift checked 2026-08-13
- Nike Training Club: Wellness on the App Store checked 2026-08-13
- Sweat: Fitness App For Women on the App Store checked 2026-08-13
- Fitbod: Gym & Fitness Planner on the App Store (subtitle: AI Personal Trainer & Workouts) checked 2026-08-13
- 30 Day Butt Challenge Pro on the App Store (developer: Rumble) checked 2026-08-13