Start with the tools already on your phone, because Screen Time and Digital Wellbeing are free and do most of the job. Add a blocker like Opal or Freedom if you need apps physically prevented from opening, an interrupter like one sec if you open apps without deciding to, or a focus timer like Forest, Flora or Work Capy if you want a session to be something you can lose.
The categories matter more than the brand names, because they fail in different ways. Prices below were checked in September 2026.
What each type of app actually prevents #
| Type | What it stops | What it doesn’t stop | Example |
|---|---|---|---|
| Built-in limits | Apps past a daily cap, notifications during Downtime | You raising the limit | Screen Time, Digital Wellbeing |
| Blocker | Chosen apps and sites opening at all | Picking up a second device | Opal, Freedom |
| Interrupter | Automatic, unthinking opens | A deliberate decision to scroll | one sec |
| Focus timer with stakes | Leaving a session without a cost | Anything, physically | Forest, Flora, Work Capy |
| Accountability | Not starting | Drifting mid-session | Focusmate |
Most people who “tried an app and it didn’t work” picked the wrong category. If you deliberately choose to scroll, an interrupter won’t help. If you open apps on autopilot, a blocker is heavier than you need.
Free tools you already have #
iPhone: Screen Time and Focus #
Screen Time includes Downtime, which blocks apps and notifications during set periods with only calls and apps you allow getting through, and App Limits, which set a daily cap for a whole category such as social networking or for individual apps. Communication Limits control who can reach you during allowed time and Downtime.
A Focus is the other half: it silences notifications from the apps and people you choose, and you can switch one on for the length of a study session.
Android: Digital Wellbeing #
Focus mode lets you pick apps to pause, and while it’s on you can’t use them and won’t get their notifications. App timers cap how long you can spend in an app, after which it closes and the icon dims until midnight. Bedtime mode handles the evening.
Why start here: it costs nothing, it’s local to your device, and for a lot of students it’s enough. The weakness is that you can lift your own limits in a few taps, which is exactly the moment the limit was for.
Blockers, for when you need the choice removed #
Opal #
Opal runs on iPhone, Mac and Android. Focus Rules block the apps you choose, a Focus Timer locks you in for a set length, and Hard Mode is described by Opal as “No way out. You can’t turn Opal off.” It also produces an Opal Score combining sleep, focus and rest. Pro adds unlimited rules, advanced timers and soundscapes, and an Allow Only mode. The site offers a free trial without publishing the subscription price.
Freedom #
Freedom blocks apps, websites or the entire internet across Mac, Windows, iOS, Android and Chromebook, with one session covering every device at once. The free plan includes basic blocking, custom blocklists and focus audio. Premium adds scheduling, recurring sessions and locked mode, at $8.99 a month, $3.33 a month billed annually, or $99.50 once for life, after a seven-day trial.
Who blockers suit: people who have already tried willpower and softer tools and know they’ll undo a limit that’s easy to undo. The trade-off is that a locked mode you can’t exit is genuinely inconvenient on the day you need something quickly.
Interrupters, for automatic checking #
If you find yourself in an app with no memory of opening it, the target is the reflex rather than the app.
one sec inserts a short pause before chosen apps open, on iOS, Android and as a browser extension, with a free Essentials tier and a paid Premium. It’s unusual in having research behind the mechanism: a 2023 study in PNAS found app use fell by 57% over six weeks, and that people closed the app instead of continuing in 36% of attempts.
That study is the single most useful finding for this whole category. A large share of phone opens aren’t decisions, and a delay of a second or two is enough to turn them back into one.
Focus timers, for when the phone has to stay #
This is the case most advice ignores: the phone is your timer, your notes or your textbook, so removing it isn’t an option. Timers with stakes attach a cost to leaving the session instead.
Forest grows a tree that dies if you switch apps with Deep Focus on. Free with in-app purchases, with a Plus subscription around $5.99 a month or roughly $32.49 to $35.99 a year for allowlists, analytics and soundscapes. Flora does the same with friend challenges attached, free with in-app purchases.
Work Capy makes the rule explicit and the penalty small. A capybara sits in a hot spring while your session runs. Leave the app for more than about five seconds and a card warns you once and tells you how long you were gone. Leave again and the session is forfeit: it earns nothing and its minutes don’t count toward your total. Nothing else is taken, so a slip costs one session rather than your streak or your history.
Three details make it fit this particular problem:
- Locking the phone never counts as leaving. Sleeping the screen and putting the phone face down is the behaviour it wants, not a risk you’re taking.
- Pausing is free, so a real phone call costs nothing if you pause first.
- It’s silent and needs no account, so your own music keeps playing and nothing leaves the device.
It also has a Desk Mode that keeps the screen dimmed and awake, turning the phone into a countdown you glance at rather than an object you pick up, and a Gentle mode that removes the stakes entirely.
The honest limit: it blocks nothing. You can open any app you like; you just lose the session. If you need to be physically stopped, use a blocker, and we set the two approaches side by side in app blockers vs focus timers.
How to pick, in order #
- Turn off notifications at the app level for everything that isn’t a person calling you. Even unanswered notifications disrupt attention, and silent mode doesn’t fix a screen that lights up.
- Set up Screen Time or Digital Wellbeing. Free, local, and often sufficient.
- Add a timer with stakes if the phone has to stay on the desk for study.
- Add an interrupter if you keep opening apps without deciding to.
- Add a blocker only if steps 1 to 4 have genuinely failed. It’s the heaviest tool and the one you’ll resent on a bad day.
None of this beats distance. If the phone can go in another room, put it in another room, and skip the apps entirely. We go through the evidence for that in why phones make it hard to focus, and the habits that go with it in how to stop checking your phone while working.
Frequently asked questions #
What is the best app to stop using your phone while studying? #
There isn’t one best app, because the tools solve different problems. Built-in Screen Time or Digital Wellbeing limits are the free starting point, blockers like Opal and Freedom are the strongest, and focus timers like Forest or Work Capy suit the case where the phone has to stay on the desk.
Is there a free app to keep you off your phone? #
Yes. Screen Time on iPhone and Digital Wellbeing on Android both cost nothing and are built in. Freedom has a free plan, one sec has a free Essentials tier, and Work Capy’s timer is free with no account required.
Can these apps be bypassed? #
Most of them, if you’re determined. Built-in limits can be lifted in a few taps, timers can be ignored by accepting the loss, and even blockers can usually be uninstalled unless you’re in a locked mode. They work by adding friction and a moment of awareness, not by making it impossible.
What’s better, blocking apps or a focus timer? #
Blocking is stronger and more annoying; a timer is lighter and easier to live with. If you routinely override your own limits, block. If your problem is drifting during a study session with the phone in front of you, a timer with a cost for leaving usually fits better.
Do I need an app at all? #
Often not. Putting the phone in another room with notifications off does more than any app on this page, costs nothing, and can’t be bypassed by tapping “ignore limit”. Apps are for the situation where the phone has to stay within reach.