One Sec Review: Friction Instead of Blocking

What it actually does

One Sec sits between you and a chosen app. Tap Instagram and instead of Instagram you get a short interruption — a deep breath, a prompt, a brief delay — and only then the choice to continue or back out.

The insight is that a large share of phone use is not decided. It is a reflex triggered by boredom or a moment of waiting, and by the time the feed loads the decision has already been made for you. Blocking addresses deliberate use. Friction addresses the reflex, which is a different failure mode and, for many people, the bigger one.

One Sec describes its interruptions as psychologist-designed, and offers several kinds: a deep breath, a mirror view, conversational reflection, rotating the phone, typing random text, and 4-7-8 breathing. It can also block apps outright during scheduled windows for periods where friction is not enough.

How hard it is to escape

Soft, deliberately. You can always continue to the app — that is the point. One Sec is not trying to stop you, it is trying to make the moment conscious.

If you need something that says no, this is the wrong category and Cold Turkey or Freedom are the right one. Many people run both: friction on the phone, blocking on the computer.

What it costs

Essentials are free. Beyond that One Sec uses a pay-once model — "pay once, use on all your devices" — rather than a recurring subscription, which is unusual in this category and worth noting. Team licences are quoted separately, starting at 83 cents per user per month billed annually. Individual paid pricing is not published on the page in a form we can quote reliably, so this profile does not state a figure; check the App Store listing for the current price.

Where it falls down

The obvious one: it is trivially bypassable, and by design. After a few weeks the breath becomes its own reflex and some people report tapping through it without registering it at all. Rotating between different interruption types is the usual answer, and the fact that One Sec ships several is a tacit acknowledgement of the problem.

It also does nothing about the length of a session once begun. Friction is a door policy, not a time limit.

Who it suits

Someone whose screen time is assembled from dozens of two-minute checks rather than a few long sessions. That pattern is extremely common — the site's 30-day screen time experiment found roughly 70% of pickups had no purpose the person could name afterwards — and it is precisely what blocking handles badly. In the site's five-app trial, One Sec was the pick for compulsive opening.