Otto's Free App Blocker

A free alternative to Clearspace

Clearspace puts a gate in front of the app: breathe, or do a set of pushups, before Instagram opens. It also lets a friend see when you break your own rules. Both of those are real features and Otto has neither. What Otto has is no bill and no sign-in.

Clearspace's prices as listed on its US App Store page in September 2026: $6.99 a month or $44.99 a year, with a family plan at $79.99. The free tier is limited. Clearspace runs on iPhone, Android and Chrome.

ClearspaceOtto
PriceFree tier, then $6.99/mo or $44.99/yrFree, all of it
Account requiredYesNo
Friction gate before openingYes, breathing or pushupsNo
Accountability partnerYesNo
Daily time limit per appSession budgetsYes, daily
Scheduled hard blockYesYes
GreyscaleNoYes
Browser extensionYes, ChromeNo
Usage data leaves your phoneYesNo

Where Clearspace is the better buy

The pause and the accountability partner are the product, and they work on a problem a timer does not touch: the reach for the phone you make without deciding to. If someone else seeing your slips is what would actually change your behaviour, pay for Clearspace. Otto cannot tell anyone anything, by design.

Where Otto is the better fit

Otto is for the person who wants the app shut, not coached. No partner, no account, nothing about your usage leaving the phone, and a greyscale switch Clearspace does not have.

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