The App Blocker You Can't Turn Off Does Not Exist. Here's What Comes Closest.
An app blocker you can't turn off does not exist: on iOS, every blocker can be deleted from your home screen, and every blocker's Screen Time permission can be revoked in Settings. Apple built it that way on purpose — the phone's owner outranks every app on it, always. What actually varies between tools, and varies a lot, is how much friction stands between your impulse and the feed, and what breaking through costs you at that moment.
You wanted a blocker that stays locked no matter what you say to it, and every app in this market knows you're searching for exactly that phrase — most of them will imply they're it. Any blocker claiming otherwise is describing its interface, not its architecture. That honest version of "can't turn off" is worth ranking properly.
Why "unbypassable" is impossible on iPhone
Blockers use Apple's Screen Time controls (the FamilyControls framework) to shield apps. That access is a permission you grant — and permissions can be un-granted. Some apps counter this by blocking the Settings app itself during a session, or by flipping the iOS restriction that prevents deleting apps; Jomo documents both techniques openly. It helps. It's still a fence around a gate you own.
And notice what every "strict" tool ships alongside its strictness: an escape hatch. Jomo includes an Emergency Mode (two uses per week, per its help center). AppBlock offers emergency unblocking through support if you lose your unlock method (AppBlock help). Brick grants five emergency unbricks per device. These aren't oversights — a blocker that truly locked out its users would generate support fires, one-star reviews, and at least one missed flight with a boarding pass trapped behind a wall. Total lockout isn't just impossible on iOS; nobody actually ships it on purpose.
So the real product category isn't "locks." It's "friction, priced in different currencies." Here's the ladder, ranked by what a bypass costs.
The friction ladder, honestly ranked
Level 1: A Screen Time passcode someone else holds
Cost of bypass: one awkward conversation. Have a partner or friend set your Screen Time passcode and keep it. Free, uses no third-party software, and surprisingly effective, because the bypass now requires admitting to a human that you want your feed back. Failure modes: you can wear the person down, and the arrangement ends when the relationship gets tired of administering it.
Level 2: Strict-mode software
Cost of bypass: waiting out a timer, or an emergency budget. Several iOS blockers ship a mode that locks its own settings while a session runs:
- AppBlock Strict Mode locks your blocks, prevents editing schedules, and blocks uninstalling the app until an unlock condition you chose is met — a PIN someone else sets, plugging into a charger, a timer, a cooldown, or approval from a contact (AppBlock). Choosing your unlock condition wisely matters more than the mode itself.
- Jomo Strict Mode allows no pauses, edits, or deletions while a rule is active, and can require retyping a long random code to change anything (Jomo). A thoughtful, well-built app overall — see our full Jomo comparison.
- Opal Deep Focus (Pro-only) runs sessions you can't cut short from inside the app — the one official exit is a single emergency pass per week, and beyond that even Opal's support won't end a session for you. Opal remains one of the most polished blockers on iOS; our Opal comparison covers who it suits best.
These modes are genuinely harder to defeat than a bare Screen Time limit, and for many people they're enough. The honest caveat applies to all of them equally: strictness lives inside an app you can still delete, behind permissions you can still revoke. The timer doesn't follow you into Settings.
Level 3: Hardware — the key becomes an object
Cost of bypass: physically going to get a thing. Brick is a small NFC puck; you tap your phone against it to block, and you need the puck again to unblock (Brick). Leave it at home and your phone stays bricked until you return — the block is now enforced by geography, which is more than software can say. The five emergency unbricks are the pressure valve, and refilling them requires emailing support, which is its own deterrent.
The catch: the puck's power is distance, and distance cuts both ways. At home — where most doomscrolling actually happens — the puck is a room away, and a bypass costs a short walk. Our Brick comparison goes deeper on where hardware shines and where it doesn't.
Level 4: Cost at the moment of temptation
Cost of bypass: actual money, every time. This is the layer we're building. Paywall (iOS, currently pre-launch — waitlist is open) blocks the apps you choose using Apple's own Screen Time controls. Opening one early costs a price you set: floor of $0.50 — because fines that are too small read as a fair price and license the behavior, per Gneezy & Rustichini's day-care study — typically $1–2, with a monthly cap so one rough week can't snowball. An unlock buys a timed session; when it ends, the wall re-arms itself, like a parking meter. Each wall also opens free after a delay you chose when arming it (30 minutes to 24 hours), so you're never permanently locked out of your own phone — the wait is free, the shortcut is not. Where does the money go? Yes, we keep it.
Note what this layer does not claim: you can still delete Paywall. Same as every app on this page — that's why app blockers don't work as locks, and why we don't sell it as one. The difference is what the bypass costs while the system stands: timers cost patience, pucks cost a walk, and both costs fade as you get used to paying them. A dollar is a dollar the hundredth time too.
Which layer should you actually pick?
- Never tried anything held away from you? Start free: give your Screen Time passcode to someone you'd hate to text about it.
- Defeated your own passcode already? Strict-mode software — AppBlock if you want unlock conditions like charger or approval contact, Jomo if you want depth and polish.
- Your problem is the phone-in-hand reflex, everywhere? Hardware. The puck is real friction, especially outside the house.
- You've waited out every timer and walked to every puck? Then friction isn't your binding constraint — price is. That's the waitlist.
FAQ
Is there an app blocker that can't be bypassed on iPhone? No. Every iOS blocker runs on revocable permissions and can be deleted. Anyone selling "unbypassable" is selling the interface. The real question is what a bypass costs you at the moment of temptation.
What is the strictest app blocker for iPhone? For software: AppBlock and Jomo both offer strict modes that lock settings and block uninstalling during sessions. For physical enforcement: Brick, which ties unlocking to an NFC puck you can leave at home.
Can an app stop me from uninstalling it? Partially — some blockers flip an iOS restriction that prevents app deletion while a session is active, and Jomo can block the Settings app itself in strict mode. All of it unwinds when the session ends, and none of it survives your determination plus a recovery path.
What actually stops someone who bypasses everything? Escalating cost. If you've beaten passcodes, timers, and hardware, the remaining lever is making each bypass cost money immediately — expensive enough to interrupt the reflex, capped enough to stay sane.
Does Paywall stop me from deleting it? No, and we won't pretend otherwise. Deleting the app is always possible — for every blocker. Paywall's job is different: while it stands, every early unlock has a price you feel right now, and that price never gets stale.
Try Paywall
You searched for a lock; the honest inventory says locks don't exist, only prices. Paywall blocks the apps you choose and charges you real money to open them early. Resisting is free.