SelfControl Review: Free, Open Source and Genuinely Unstoppable
SelfControl blocks sites on a Mac until the timer expires, and restarting or deleting it will not help. It costs nothing and it does not negotiate.
Best for
A free, absolutely non-negotiable site block on a Mac.
Skip it if
You need apps blocked, or anything covered beyond a Mac. SelfControl blocks sites on macOS and nothing else.
- Platforms
- Mac
- Type
- Desktop App
- Pricing
- Free and open source — free as listed in August 2026
- How hard to escape
- Very hard — built so that restarting, reinstalling or deleting will not lift a block.
What it actually does
You add sites to a blacklist, set a timer, and start it. Those sites are unreachable until the timer runs out.
The distinguishing property is that there is no off switch. Quitting the application does not lift the block. Deleting it does not lift the block. Restarting the machine does not lift the block. The timer runs out, and until it does you are simply not getting to those sites on that machine.
That is a genuine commitment device, for free, from an open source project.
How hard it is to escape
Very hard, and this is not marketing language — it is the documented design intent. Alongside Cold Turkey, it is the strictest thing in the site's catalogue.
Set short timers until you are confident in your blacklist. There is no recovery from blocking something you turn out to need, and "I will just restart" is not available.
What it costs
Nothing. It is free and open source, with no tier, no account and no subscription. For a category where the standard offer is $8 to $12 a month, that is worth stating plainly.
Where it falls down
The limitations are narrow but hard.
**macOS only.** No Windows, no phone, nothing else.
**Sites, not applications.** It blocks network destinations. It will not stop you opening a desktop app, and it will not touch your phone — which for most people is where the problem actually lives.
**No scheduling or polish.** You start it manually each time. There is no recurring session, no cross-device sync, no reporting. It does one thing.
Who it suits
Someone doing focused work on a Mac who wants a hard block on specific sites and does not want to pay for it. It pairs naturally with a phone-side tool, because it will do nothing for your phone — running SelfControl on the laptop and ScreenZen or One Sec on the phone is a sensible free combination.
It also appears in the site's roundup of the best free website blockers, where the absence of a paywall on genuinely strict blocking makes it hard to argue with.
Common questions
Is SelfControl really free?
Yes. It is free and open source, with no paid tier, account or subscription.
Can you stop a SelfControl block early?
No. Quitting, deleting or restarting will not lift an active block. That is the design intent, so set short timers until you trust your blacklist.
Does SelfControl work on Windows or iPhone?
No. It is macOS only and blocks sites rather than applications.
Alternatives worth considering
- Cold TurkeyThe strictest blocker — no workarounds
- LeechBlock NGAdvanced site blocker for power users
- StayFocusdTime limits for distracting sites
Head to head
Sources
Written from the vendor’s own documentation, not from hands-on testing. Prices and features change; where a figure is quoted it carries the month it was checked.