Otto's Free App Blocker

A free alternative to one sec

one sec is free for a single app of your choice; covering more than one is $2.99 a month or $19.99 a year. Otto has no cap on how many apps you cover and no paid tier at all.

one sec's prices as listed on its own US App Store page in September 2026: Pro at $2.99 a month, $19.99 a year, or $99.99 lifetime, with one app free. Prices change, so check the App Store for today's.

one secOtto
PriceOne app free, then $2.99/mo or $19.99/yrFree, all of it
Apps you can coverOne, without ProNo limit
The breathing pause before an app opensYes, this is the whole ideaNo
Daily time budget per appWith ProYes
Scheduled hard blockWith ProYes
GreyscaleNoYes

Where one sec is the better buy

one sec is built on one genuinely good idea: a deliberate pause and a breath before the app opens, which breaks the reflex rather than fighting it. If you do not want to be blocked, you want to be interrupted, that is a different product and Otto does not do it.

Where Otto is the better fit

If a pause is not enough and you want the door actually shut, Otto shuts it. A budget that runs out, or a window where the app does not open at all, on as many apps as you like.

This is one of fourteen paid app blockers compared side by side on the alternatives page. There is also a guide to cutting phone use covering the setup no app does for you.

Otto is free, on both stores

No paid tier, no trial that expires, no account. There is a tip jar in the settings and that is the whole business model.

Get it on Google Play Download on the App Store