Willpower is a poor defense against a browser tab that is one keystroke away. That is why focus blockers remain some of the most popular productivity apps on the Mac: you decide in advance what is off-limits, and the app holds you to it when your resolve slips. Freedom, Cold Turkey Blocker, Opal, and SelfControl are the names that come up most often, and they differ a lot in how strict they are, which devices they cover, and how you pay for them.

This guide compares all four on website and app blocking, lock strength, scheduling, cross-device sync, and current pricing, so you can pick the one that matches how easily you get distracted.

Quick Verdict

Choose Freedom if you want one blocklist and schedule that syncs across your Mac, iPhone, and other devices, with a Locked Mode for sessions you can't quit.

Choose Cold Turkey Blocker if you want the strictest Mac blocker with the most locking options, and you prefer a one-time purchase to a subscription.

Choose Opal if you mainly fight phone distraction and want a polished app that now also blocks sites and apps during focus sessions on your Mac.

Choose SelfControl if you want a free, open-source, no-account blocker that simply cuts off a list of sites until a timer runs out.

Feature Comparison

Freedom

Freedom is the best-known blocker that works everywhere. You build blocklists once (specific sites, whole categories, or desktop apps) and start a session that applies across your Mac, Windows PC, iPhone, Android phone, and Chromebook at the same time. That matters more than it sounds: blocking a site on your Mac does little good if you pick up your phone and open it there instead.

The free plan now covers the basics well: website, app, and full-internet blocking, custom blocklists, unlimited devices, sync, and focus music. Premium adds the features that turn it into a habit system: advance and recurring schedules, sessions longer than two hours, and Locked Mode, which stops you from ending a session early. Freedom also supports allow-only sessions on the Mac, where you pick the few sites you need and everything else is blocked, which works well for writing and research.

Pricing is $8.99/month, or $3.33/month billed yearly, with a 7-day trial. A one-time Premium Forever plan is listed at $99.50, shown as 50% off its regular $199 price at the time of writing.

Choose Freedom if you get distracted on more than one device and want one schedule that covers all of them.

Cold Turkey Blocker

Cold Turkey Blocker has a reputation as the toughest blocker around, and its feature set backs that up. It blocks websites through extensions it installs for each supported browser, blocks desktop apps in the Pro version, and gives you several ways to make a block hard to undo: typing out a long string of random characters, requiring a restart, locking with a password (handy if someone else holds it), or preventing any changes during set hours on set days.

It is also more flexible than the "nuclear option" reputation suggests. Pro adds breaks and allowances, including Pomodoro cycles, limited daily allowances for a site, earned rewards after focused work, and delays before a break starts. The free version covers website blocking, exceptions, timed blocks, and statistics, and includes a 7-day trial of Pro features.

The trade-off is scope: Cold Turkey runs only on macOS and Windows. There are no phone apps and no sync, so your iPhone stays unprotected. Pricing is refreshingly simple: Blocker Pro costs $45 once and covers every computer you personally use, with a 30-day money-back guarantee. Students can request a 20% discount through support.

Choose Cold Turkey if the computer is where you lose most of your time, you need a block you genuinely can't talk yourself out of, and you dislike subscriptions.

Opal

Opal became popular as an iPhone screen-time app with a polished design and a focus score that makes progress visible. Its Mac app extends that into your workday: Sessions block distracting websites and apps with three difficulty levels (Normal, Timeout, and Deep Focus), and it requires macOS 13 or later.

Be clear about what the Mac version does today. Opal's own Mac page says App Limits and Locks are not yet available on the Mac, and syncing between iPhone and Mac is "coming later this year." So, for now, the Mac app is a focus-session blocker rather than a full mirror of the phone app's rules. Your Opal Pro subscription covers the Mac app at no extra cost.

The free plan includes one rule, basic timers and soundscapes, app blocking, and today's Opal Score. Pro adds Hard Mode (no way to turn Opal off), unlimited rules, the Allow Only feature, and score history for $19.99/month, $99.99/year, or $399 for lifetime access. Students can apply for up to 50% off.

Choose Opal if your phone is the bigger problem and you want the same app to handle focus sessions on your Mac too, or if you already pay for Opal Pro.

SelfControl

SelfControl is the classic free Mac blocker, and its design is deliberately blunt. You add sites (or mail servers, or anything else on the internet) to a blocklist, set a duration, and click Start Block. Until the timer runs out you can't reach those sites, even if you restart your Mac or delete the app. An Allowlist option flips it around so only the sites you list are reachable.

There is no account, no subscription, no sync, and no scheduling. SelfControl is open source under the GPL and maintained by its original developers and community contributors, with version 4.0.2 listed on its site. It blocks network access rather than apps, so a distracting desktop app like a game or a chat client stays open.

Choose SelfControl if you want a free blocker that does one thing reliably and you're happy to start each block by hand.

Which Blocker Should You Use?

Use Freedom if you switch between a Mac and a phone all day and need one schedule that blocks the same distractions on both.

Use Cold Turkey Blocker if you have tried gentler blockers and always found a way around them. Its restart and random-text locks are the hardest to bypass of the four.

Use Opal if you want an iPhone screen-time app first and a Mac focus-session blocker second, and you like a guided, design-forward experience.

Use SelfControl if you want a free, private blocker for occasional deep-work blocks and don't need scheduling or app blocking.

A practical tip: whichever blocker you use, long locked sessions are also long stretches of staring at a screen. A break reminder like LookAway pairs well with a blocker, since it nudges you to rest your eyes without reopening the distractions you just blocked.

Final Verdict

Freedom is the best all-round choice for most people, because distraction rarely stays on one device and Freedom is the only app here that blocks across Mac, iPhone, Android, Windows, and Chromebook today.

Cold Turkey Blocker is the best choice for maximum strictness on a Mac, and its $45 one-time price is the best value of the paid options if you don't need phone coverage.

Opal is the best choice if your phone is the main problem, with a Mac app that is useful for focus sessions but still catching up on rules, locks, and sync.

SelfControl is the best free choice, as long as a simple timer-based website block is all you need.

My practical recommendation: start with Freedom's or Cold Turkey's free version for a week. If you keep ending sessions early, that tells you which paid lock feature is worth buying.

Catch these apps on sale: many paid Mac apps, including focus and productivity apps, run discounts at least once a year, most often around Black Friday. Subscribe to the Apps.Deals newsletter to hear when the deals arrive.

Note: Features and prices are current as of September 2026. Promotional pricing, Opal's Mac features, and platform support can change. Verify current pricing and features on each developer's official site before buying.

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