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How to block distracting apps — and why most attempts fail.
Short answer: start with the blocking your phone already has, and add a physical key only once you have watched software friction stop working on you.
Three kinds of tool, and where each one gives way
To block distracting apps, start with what your phone already has. On iPhone, Screen Time’s App Limits cap an app or a whole category each day, and Downtime makes most apps unavailable on a schedule — on iOS 27 they are called Time Allowances and Screen Time Schedule. On Android, Digital Wellbeing’s app timers and Focus mode do the same job, and a second user profile without the apps installed is one of the strictest free options on any phone. All of it is free, and for plenty of people it is enough.
Where it fails is structural, not technical: you hold the passcode, so the off switch sits as close as the on switch. Third-party blockers add schedules and stricter modes, some free and many on a subscription, but if the unlock still depends only on software you control, they give way at the same moment. The last option is to move the unlock off the phone — a key you have to walk to, or a lockbox that holds the whole phone until a timer runs out. Spark is one such key: a free app and a key you buy once, worth it only once the free tools have failed you.
| Method | What it does | Cost | Read |
|---|---|---|---|
| Built-in free tools | Screen Time on iPhone; Digital Wellbeing, Focus mode and a second user profile on Android. You hold the passcode, so you can always undo them. | Free | iPhone guide · Android guide |
| Software blockers | Third-party apps with schedules and stricter modes. The unlock still depends on software you control. | Free or subscription | Why blockers stop working |
| Physical keys and lockboxes | A key you have to walk to before blocked apps open, or a box that holds the whole phone until a timer runs out. | One-time purchase; some keys add a subscription | Digital detox devices |
Start with what the phone already gives you
Both platforms, every built-in method, ranked by what each one actually enforces rather than by what it promises. Exhaust the free tools first — if Screen Time holds for you, you do not need anything else, and we would rather say that here than sell you a key you did not need.
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Lockboxes, dumbphones, timer safes and app keys (Bluetooth or NFC): what each physically prevents, what it costs, and the way each one is defeated.
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A phone setup for a NEET or JEE year: what to block, what to keep open for lectures, where the key goes in a hostel or shared room, and how it fails.
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Read the guideIf a guide raised a different question
The alternatives, side by side
Screen Time, deleting the app, greyscale, rigid timers and willpower — what each one gets right, and how each one is eventually defeated.
See the comparisonResearchWhat the studies actually say
Published work on interruption cost, phone proximity and evening screen use, each linked back to the original paper rather than paraphrased.
Read the evidenceUse casesWhat to block, situation by situation
Deep work, studying, sleep, family time and training — the specific setups, including which apps stay unlocked and why.
Browse use casesMove the unlock off the phone.
Locking is one tap and never needs the key. Unlocking means getting up and holding your phone against it — a cost your tired self can't pay from the sofa. The app is free; the key is the one-time buy.