// buyers guide // May 06, 2026 // 6 min
Best app to block porn on iPhone and Android in 2026
What to look for in a porn blocker, why most of them fail within a week, and how NoPhone's key-holder lock is different.
Most people looking for a porn blocker have already tried one. Screen Time, a browser extension, a free filter from an app store. They worked for about four days. The problem is almost never the filter quality — it is that the person who installed the block is also the person who can remove it, in about twenty seconds, at the exact moment they least want to be stopped.
> What a blocker has to do to actually hold
- ▪Block by category, not by domain list. A manual blocklist loses to one new tab.
- ▪Cover the whole device, not one browser. Blocking Safari while Chrome, Reddit and a browser inside another app stay open is not a block.
- ▪Have an unlock that is slow and involves another person. Instant self-service disable is the single biggest reason blockers fail.
- ▪Survive reinstalls and settings changes without you having to re-configure it every week.
> How NoPhone approaches it
NoPhone works as a timed lock rather than a permanent filter. You pick what gets blocked — adult websites, specific apps, or whole categories — then choose a duration from one day up to thirty. Once the lock starts, the timer cannot be shortened from your phone. If you want out early, that goes through a key holder: someone you nominated while you were clear-headed.
A blocker you can switch off in ten seconds is not a blocker. It is a reminder with a subscription fee.
> iPhone vs Android
On both platforms the mechanics of the lock are the same: pick the categories, set the duration, name a key holder, start the timer. Set it up once at a calm moment rather than during a bad night, because the setup screen is the last point where your future self gets a vote.
> How to choose a duration
- ▪1–3 days: a reset after a bad week. Enough to break the automatic reach.
- ▪7 days: the standard focus lock. Most of the difficulty lives in the first 72 hours.
- ▪14–30 days: a deep reset, best chosen after you have already completed a shorter one.
If you are picking your first lock, take seven days. It is long enough to get past the bargaining phase and short enough that you will actually start it today.