How to Block Apps While Studying

The most common mistake with study blockers is blocking too much. People turn on a "lock everything" mode, sit down to study, and discover forty minutes later that the lecture app, the PDF reader or the calculator is also locked — usually with no way to unlock it. They uninstall the blocker that evening and never try again. This guide is about the setup that survives an actual exam week.

Block per study block, not per day

A whole-day block sounds serious and behaves badly. Your day contains breaks, meals, and the twenty minutes where you genuinely need to message someone about the group project. A block that spans all of it will be broken, and once you have broken it, the rest of the day is unprotected.

Match the block to one study block instead: 25 minutes if you work in pomodoros, 50 to 90 if you work in longer sittings. The session ends on its own, you take a real break with your phone, and you start the next one. This has a second effect that matters more than it sounds: finishing a session becomes a small completed thing, and the count of completed sessions is a much better daily measure than hours vaguely "spent studying".

The three lists

Decide these once, then never think about it again.

Always blocked: short-video apps, social feeds, games, and community or forum apps. These are the ones that cost you the session, not the ones that cost you a minute.
Blocked, but think about it: your browser and your messenger. The browser belongs in the blocked list if you study from paper or a dedicated app — but if your material is on the web, blocking it makes studying impossible. The messenger is the same trade: block it for deep sessions, leave it for group work.
Never blocked: lecture and course apps, PDF and e-book readers, note apps, dictionary, calculator, music, phone and messages. Anything you might need because you are studying. Never blocking them is simple in a blocker that works from a chosen list rather than an "everything except" mode.

This is why an app blocker that works by picking apps is easier to live with than one that blocks everything and asks you to whitelist exceptions. With a chosen list, forgetting to add an app is harmless. With a whitelist, forgetting one means you are locked out of it mid-session.

Be careful with strict mode during exam season

Strict mode — no ending early, no exceptions — is genuinely useful for the sessions where you know you will negotiate with yourself. It is also the feature behind the worst reviews in this category, because people turn it on for long durations right before they need their phone. Two rules keep it safe:

Use strict mode only on short sessions at first. A strict 25-minute block is a commitment. A strict eight-hour block on a day with a family emergency is a story you will tell angrily.
Check what your blocker does to the Settings app. Some lock it, which means you cannot reach Wi-Fi, Bluetooth or alarms for the duration. That is not strictness, that is a broken phone. A blocker should stop you opening a feed, not stop you turning on Wi-Fi before an online exam.

Use the numbers, but the right ones

Screen-time apps report hours. Hours are a bad study metric — you can sit for four hours and absorb nothing. Two numbers are more honest:

Blocked attempts. How many times you reached for a blocked app during a session. High on day one, and falling over two weeks is the clearest sign the habit is actually changing.
Completed sessions. Sessions you let run to the end. Three completed 50-minute sessions is a real day. Six started and abandoned ones is a day you felt busy.

Look at these weekly rather than daily. Daily checking turns a useful signal into another thing to feel bad about.

A setup that works for most students

Make a Study set with the short-video apps, social feeds and games. Default length 25 minutes if you use pomodoros, 50 otherwise. Leave your lecture and note apps out of the set entirely.
Make a Deep work set that adds the browser and messenger, default 90 minutes, strict mode on. Use this one for the sessions where you have already decided the outcome matters more than your comfort.
Schedule the Study set for the hours you always intend to study — weekdays 9 to 11, for instance. Automatic beats remembering; you can always start it manually on top.
Put the widget on your home screen so a session starts with one tap. The tap should be easier than opening the app you are trying to avoid.
After the exam period, keep the Study set and delete the schedule. The habit is the set, not the calendar.

Two failure modes to watch for

Studying on a second device. A phone block is not a computer block. If you find yourself doing the same scrolling on a laptop, the phone blocker is working and the problem has moved. Use the browser's own site blocking there, or study somewhere the laptop is only for the material.

The messenger loophole. If you leave a messenger open, links shared inside it open in the messenger's own built-in browser, which is not your browser and does not obey a browser block. If you lose sessions this way, either block the messenger during deep sessions or turn off its in-app browser in its settings.

Stillmode is built for this: sets of chosen apps, a length, one tap to start, strict mode as a per-set option that never touches your Settings app, and stats for blocked attempts and completed sessions. Free, no account, works offline.