Yes, there are apps that block your phone until you exercise, and in 2026 there are enough of them that the question is no longer whether but which. They all sit on the same foundation, Apple’s Screen Time and Family Controls frameworks, which is what lets one iPhone app put a shield over another. Where they differ is the thing that dismisses the shield: reps counted by the camera, steps read from your Health data, or a workout logged by your watch.
I build one of these apps, RepUnlock, so read the verdicts knowing that. The facts about the other five come from their public listings and websites on the day this was written, and where a price could not be confirmed first-hand it says so rather than guessing.
Quick comparison
| App | What unlocks | Exercises | Exchange rate | Price | iOS |
|---|---|---|---|---|---|
| RepUnlock | Reps, camera-verified | Push-ups, squats, jumping jacks, high knees, lunges; walking from step data | 1 rep = 1 minute | Free to download, optional Premium | iOS 17+ |
| Fit to Scroll | Reps, camera-verified, or daily Health goals | Push-ups, knee push-ups, squats, planks, lunges, sit-ups, leg raises | 1 rep = 1 minute (adjustable) | Free, then $2.99/mo or $19.99/yr | iOS 17+ |
| StepBloc | Steps from HealthKit, or camera push-ups and squats | Steps, push-ups, squats | Step and rep targets you set | Free, then $3.99/mo, $19.99, or $29.99 lifetime | iOS 16+ |
| PushUp Time | Reps, on-device AI | Push-ups, squats, sit-ups | A set unlocks a 15, 30, 60 or 120 minute window | Subscription (see listing) | See listing |
| Time Out | A fitness goal, mainly steps | Steps, plus gentler goals like chair exercises or meditation | Goal complete = apps unlock | 7-day trial, then $3.99/mo or $39.99/yr | See listing |
| LOCKEDIN | Any workout logged in Apple Health | Whatever your watch or fitness app records | Workout logged = apps unlock | Free, Pro $0.99/mo (per its maker) | See listing |
The three ways an exercise blocker can verify you
Before the individual apps, the decision that matters most. How an app checks that you exercised decides how easy it is to cheat, and how easy it is to cheat decides whether it still works in week three.
1. Camera-verified reps
A pose-estimation model watches you through the front camera and counts a rep only when the movement completes. This is the hardest to fake, the fastest to earn (ten push-ups takes about thirty seconds), and it needs no wearable. The trade-off is that you have to prop the phone up and be somewhere you can do a set. RepUnlock, Fit to Scroll, PushUp Time and StepBloc’s camera modes all work this way.
2. Steps from Apple Health
The app reads your step count and unlocks when you cross a target. It is the gentlest option and works for people who cannot do floor exercises. It is also the easiest to game: steps can be registered by a shaken phone, and a target of 10,000 is either already met by lunchtime or impossible on a desk day. Time Out and StepBloc’s step mode are the examples here.
3. Workouts logged by another app
The blocker trusts whatever your Apple Watch, Strava or gym app writes to Apple Health. Flexible if you already train, but the app is only as strict as the loosest thing that can log a workout, and a manually added “workout” counts the same as a real one. LOCKEDIN takes this approach.
The override button is the real test
RepUnlock
Best for: people who bypass their own limits. RepUnlock blocks the apps you choose through Screen Time and unlocks them for reps the front camera counts on-device: push-ups, squats, jumping jacks, high knees and lunges, with walking counted from step data as a no-camera option. One rep buys one minute, so the cost of opening TikTok is something you can work out in your head before you reach for it. There is no override delay and no ignore button.
The part no other app on this list has is Volt, the creature who holds your screen time. Your reps feed him, your scrolling visibly drains him on the lock screen, and at empty the apps lock. He gets hungry when you skip days and reacts when you keep trying to open a blocked app. It sounds like a gimmick until you notice you are doing squats because he looked sad.
Camera frames never leave the phone. It is free to download with an optional Premium tier, and it needs iOS 17 or later. Weak points: no Android, no Mac, and it is strict by design, so if what you want is a gentle nudge, look at Time Out instead.
Fit to Scroll
Best for: the widest exercise list. Fit to Scroll counts push-ups, knee push-ups, squats, planks, lunges, sit-ups and leg raises through the camera, at a default of one rep per minute of screen time that you can make harder. It also lets daily fitness goals (steps, distance, exercise minutes, heart rate) add to the same balance, so it straddles the camera and Health approaches. Its listing shows a 4.5 rating from 83 reviews, unlock-all pricing of $2.99 a month or $19.99 a year, and iOS 17 or later.
Weak points: the Health-goal path is the softer route in, and there is nothing on the lock screen showing you the balance draining, so the feedback loop lives inside the app.
StepBloc
Best for: a steps-first blocker with a camera option. StepBloc started as a steps-to-unlock app reading HealthKit and later added camera-counted push-ups and squats. It has the largest review base of the group at the time of writing (4.5 from 485 ratings), supports iOS 16, and is the only one here with a lifetime purchase: $3.99 a month, $19.99 for a premium pass, or $29.99 once.
Weak points: two camera exercises versus five to seven elsewhere, and a step target is the easiest unlock on this page to satisfy without actually moving.
PushUp Time
Best for: a simple set-then-window model. PushUp Time counts push-ups, squats or sit-ups with on-device AI and, rather than banking minutes, opens an unlock window of 15, 30, 60 or 120 minutes once you finish a set. It works without an internet connection. Pricing is a subscription; the exact figure changes between regions, so check the listing.
Weak points: the window model means a single set can buy two hours, which is generous for a doomscroller, and there is no per-minute drain to make the cost of each extra minute visible.
Time Out
Best for: walkers, and anyone who cannot do floor exercises. Time Out locks any app until you complete a fitness goal, typically a step count such as 10,000, and explicitly supports gentler goals like chair exercises or meditation sessions. Its own pitch is the absence of an override button. It offers a seven-day trial without a card, then $3.99 a month or $39.99 a year.
Weak points: goal-based unlocking is all or nothing. A rep counter lets you buy five minutes with five reps; a 10,000-step goal either unlocks your whole day or none of it.
LOCKEDIN
Best for: people who already train with a watch. According to its maker, LOCKEDIN reads any workout from Apple Health and unlocks your apps once one is logged, blocking through Family Controls like the rest. It is free with a $0.99 a month Pro tier. If you already run or lift daily, this adds a blocker to a habit you have rather than asking for a new one.
Weak points: it verifies nothing itself. Anything that writes a workout to Health, including a manual entry, satisfies it.
Which one should you pick?
- You tap “Ignore Limit” and hate yourself for it: RepUnlock. The exit is physical, per-minute, and there is a creature watching.
- You want the most exercises to choose from: Fit to Scroll.
- You want to pay once: StepBloc’s lifetime purchase.
- You would rather earn a block of time than bank minutes: PushUp Time.
- Floor exercises are not an option: Time Out, with step or gentle goals.
- You already log workouts every day: LOCKEDIN.
Every app here can lock TikTok. Only one of them puts something on your lock screen that gets visibly hungrier the longer you go without moving.
Get RepUnlockWhat none of them can do
None of these apps run on Android, because Android has no system-level equivalent of Family Controls; Android blockers rely on accessibility services that are a settings toggle away from off. None of them can stop you deleting the blocker, though Screen Time’s own settings can make that require a passcode you give to someone else. And none of them make you fit on their own. Ten push-ups a few times a day is real movement, and it does reduce screen time, but the goal is fewer thoughtless app opens, not a training programme.
If push-ups specifically are your thing, the push-up app blocker setup covers that configuration, and the PushScroll comparison goes deeper on the two rep counters most often put side by side. Or skip the reading: download RepUnlock, block one app, and see what twenty squats feels like as a price.