Do app blockers work? What the studies show

By the edgi team Updated October 23, 2026 Facts checked October 23, 2026

App blockers work while they stay on, and the studies show that staying on is the hard part: in a 2025 experiment, only about a quarter of the people who committed to blocking mobile internet for two weeks kept the block on. So the blocker to pick is one you'll keep: one that leaves you some use, asks a small price at the door and makes loosening slow. edgi's free Focus lock is built that way: each app opens as many times a day as you set, a 60-second Lesson opens it, and loosening waits until midnight.

We make edgi, and Focus is built around what this research shows.

What the research found

Two recent studies, both in PNAS journals, tell most of the story.

The total block. In a randomized experiment published in PNAS Nexus in February 2025, 467 people committed to blocking all mobile internet on their phones for two weeks, using the Freedom app. The block helped: the paper reports better well-being, better mental health and better sustained attention. But only 119 of the 467, about 25.5%, kept the block on for at least 10 of the 14 days. The block worked. Keeping it was the problem.

The pause. In a 2023 PNAS study of one sec, which puts a short breathing pause in front of chosen apps, 280 people used it for six weeks. They closed the app 36% of the times the pause caught them, and by week six they tried to open those apps 37% less. A small, permanent friction worked, without anyone giving the app up, and it kept working for the whole six weeks.

Put together: blocking helps, total blocking is hard to keep, and a small price on every open does a lot of the work on its own.

Why total blocks fail

A total block asks you to stop a habit cold, and habits don't stop cold. The cue still fires: boredom, a pause, the bus, bed. With the app gone, the cue has nowhere to land, so it lands on the off switch. Behavioral therapists stopped asking people to "just stop" decades ago:

Habit reversal training Habit reversal training treats tics, hair pulling, and nail biting by teaching a physical action that blocks the repetitive urge.

60-second Lesson

Habit reversal training

Habit reversal never asks you to just stop. It catches a habit's first sign and swaps in a move that makes the habit impossible.

Play it here Read about habit reversal training

The blocker that lasts does the same thing. It catches the reach, the first sign of the habit, and swaps in something else.

The pause study points the same way. A pause catches the reach and leaves you the app, and it lasted. What it doesn't do is give the reach anything to land on, which is the gap edgi fills.

What a blocker that lasts looks like

From the studies and from habit research, the design that holds has four parts:

1. Intentions, not bans. You keep some use: a number of opens, a number of minutes, on the days you choose. Nothing to rebel against.
2. A price at the door. Every open, or the first of the day, costs something small.
3. A price that's worth paying. Something that changes each time and leaves you better off, so it stays a real choice.
4. Slow loosening. Tightening is instant; relaxing waits, so the tired version of you can't undo the plan.

That's edgi's Focus, part for part. Setup lives in edgi's Settings, under Focus, where you pick apps with the iPhone's Screen Time picker. For each, write the intention ("I'll open TikTok no more than 3 times a day, for 5 min each time"), pick the days, and choose whether a Lesson opens it once a day or every open. Reach for TikTok and the screen says "One lesson opens TikTok for 5 minutes." A looser rule starts tomorrow; a stricter one starts now.

The part no blocker measures

Every Lesson at edgi's door is one idea, a minute long, that you guess at, tap through and test, and it becomes a card. Return to an idea and the card turns foil, then gold, on a Map of everything you've learned. The block screen shows your streak too, which one Lesson a day keeps going. That's a reason to keep the lock on that builds every week.

To write your own rules, see app intentions. For every free option, see the best free app blocker for iPhone.

FAQ

Do app blockers actually work? Yes, while they stay on. In a 2025 PNAS Nexus study, blocking mobile internet helped, but only about a quarter of people kept a total block on for most of the two weeks. Blockers that allow some use and put a small price on each open are easier to keep.

Why do I keep turning off my app blocker? A total block leaves the habit's cue with nowhere to go, so it goes to the off switch. Give the reach something to do instead, like a 60-second Lesson.

What is the most effective app blocker? The one you'll keep on. edgi's free Focus lock sets opens and minutes per app, opens them after a Lesson, and makes loosening wait until midnight.

Is edgi free? Yes. edgi is free on iPhone, Focus included.