Quick verdict
Freedom is the closest like-for-like swap for Opal, and it runs about $60 a year cheaper. Cold Turkey is better if your real problem is a laptop rather than a phone. ScreenZen is free and enough for a lot of people. Sunnah Lock, which I built, is the one to pick if what you need blocked is explicit content rather than Instagram.
That last line is my bias, stated up front. I make one of the six apps here. Read the rest knowing that. I have tried to be straight about where the others beat mine, and there are places where they do.
Why people leave Opal
Opal is a good app. Worth saying before the criticism.
The trouble is what it costs and what it was never built to do.
Opal Pro is $99.99 a year, or $19.99 month to month. There is a $399 lifetime tier. For a screen time app that is steep. Apple's built-in Screen Time costs nothing, and most of this list sits under $40.
Then there is Android. Opal ships an Android app, but it is not the same product as the iPhone one. Apple hands developers a Screen Time API that enforces blocks at the system level. Android has no equivalent, so every Android blocker has to route through the Accessibility Service instead. Opal's Android build leans on that, carries ads on the free tier, and enforces more loosely than the iOS version. If you installed it on a Pixel expecting the experience iPhone reviewers described, that gap is probably why you are reading this.
The third reason is the one I care most about. Opal is a focus app. It exists to stop you opening Instagram at 2pm on a Tuesday. It was not designed to keep explicit content away from you or your children. Those are different jobs with different requirements, and a lot of people search for an opal app alternative when what they actually want is a filter, not a timer.
What to look for in an opal app alternative
Four things separate the apps on this list.
Can you get around it? Most blockers fold the moment you open Android Settings and revoke the permission. If the block only holds while you want it to hold, it is a reminder, not a block.
What does it block? Apps and websites are the easy part. Blocking a search term, or a Reel inside an app you still need, is much harder and most of these do not attempt it.
Which devices? A phone-only blocker leaves the laptop wide open. A desktop-only one leaves the phone.
What does it cost after the trial? Several apps here are generous for a month and then are not.
1. Sunnah Lock — best if the problem is explicit content
I built this one, so weigh what follows accordingly.
Sunnah Lock blocks apps, websites and keywords, and it goes after Reels, Shorts, explicit sites and explicit search results before they load. The keyword layer is the part Opal has no answer for. You can leave a browser installed and still make whole categories of search return nothing.
Strict mode is the other difference. Turning a block off requires the PIN, and uninstalling or disabling the app is locked down too. That matters for a child's phone, where the failure mode is not weak willpower but a ten-year-old who found the Settings menu.
It is free on Android during launch, and early users keep a full year at no cost, including anything shipped in that year.
Where it loses. There is no iPhone version. If you are on iOS, close this tab and scroll to Freedom, because Sunnah Lock cannot help you yet. Windows is in development and not out. It is also a newer app than everything else here, which means a smaller review history to judge it by. If you want a decade of track record, that is a fair reason to pick something else.
2. Freedom — the closest swap for Opal
If you liked Opal and only want to stop paying Opal prices, this is your app.
Freedom covers Android, iPhone, Mac, Windows and Chrome, and syncs sessions across all of them. Start a block on your laptop and your phone goes quiet at the same time. Opal does this too. Freedom charges $39.99 a year for it instead of $99.99, or $99.50 once for lifetime access.
Locked mode is the feature worth paying for. It stops you ending a session early, which is the entire point of a blocker and the thing free tiers usually withhold.
Where it loses. The free plan drops scheduling and locked mode, which are the two features that make it work, so treat free as a trial. It blocks apps and sites but not keywords or content types, so explicit material still arrives through any app you have allowed. And any blocker you can end early eventually stops holding. That is the ceiling on this whole category, not a fault specific to Freedom.
3. Cold Turkey — the strongest desktop lock
Cold Turkey is the most stubborn blocker on this list and it is not close.
Frozen Turkey can lock you out of the entire computer on a schedule. Not an app. The machine. Pro is $39 once, no subscription, and the licence covers every computer you personally use.
Where it loses. There is no Android app and no iPhone app. The developer's own documentation says operating system limitations prevent building something equally hard to remove on mobile, which is an honest answer and also a disqualifying one if your phone is the problem. The free tier only blocks websites; app blocking and the unbreakable timer are behind the paid licence. Pick Cold Turkey as a companion to a phone blocker, not instead of one.
4. BlockerX — built for adult content, priced accordingly
BlockerX is one of the few here aimed squarely at explicit material rather than productivity, and it extends to gambling, gaming and dating apps.
It has been around long enough to have a real user base and an accountability-partner feature, where a second person gets told when you change your settings. For some people that social pressure works better than any technical lock.
Where it loses. $129 for lifetime access is the highest entry price here, and there is no meaningful free tier to test it with first. If you want this category without the price tag, keep reading.
5. ScreenZen — the best free option
ScreenZen runs on donations and asks for nothing. That is unusual and worth respecting.
It works on friction rather than walls. Open Instagram and it makes you wait, or answer a question first. That pause is often enough to break the reflex, and for people whose problem is absent-minded reaching rather than deliberate seeking, it is genuinely all they need.
Where it loses. Friction is not enforcement. Anyone who actually wants past it gets past it in seconds, and tamper resistance is minimal. It does not filter explicit content. If you are setting up a child's device, this is the wrong tool.
6. AppBlock — the plain scheduler
AppBlock does app and site blocking on a schedule through the Accessibility Service, with no VPN required, which matters because VPN-based blockers break other apps and eat battery.
It is not trying to be clever. It blocks the apps you list during the hours you set, it is cheap, and it works.
Where it loses. No keyword filtering, no explicit content filtering, and uninstall protection that a determined user walks straight through. It is a scheduling tool. Judged as one, it is fine.
Side-by-side comparison
| App | Platforms | Price | Blocks keywords | Explicit filter | Hard to remove |
|---|---|---|---|---|---|
| Sunnah Lock | Android (Windows, iOS in development) | Free during launch | Yes | Yes | Yes, PIN + uninstall lock |
| Freedom | Android, iOS, Mac, Windows, Chrome | $39.99/yr or $99.50 once | No | No | Locked mode, paid only |
| Cold Turkey | Windows, Mac only | $39 once | No | No | Yes, on desktop |
| BlockerX | Android | $129 lifetime | Partial | Yes | Partial |
| ScreenZen | Android | Free | No | No | No |
| AppBlock | Android | Free tier, paid upgrade | No | No | No |
| Opal | iOS, Android (weaker) | $99.99/yr | No | No | Yes, on iOS |
Which one should you pick
On an iPhone: Join the Sunnah Lock iPhone waitlist — the iOS version is in development and you will hear the day it lands. Until then Freedom works today, and I would rather tell you that than have you wait on a build that is not out.
Distracted on a laptop: Cold Turkey, paid, is the hardest desktop lock there is. Sunnah Lock for Windows is in development and will carry the same keyword and explicit-content filtering the Android app has, which Cold Turkey does not do at any price.
Blocking explicit content, especially on a child's phone: Sunnah Lock or BlockerX. Sunnah Lock is free right now and blocks keywords; BlockerX costs $129 and has the accountability-partner feature. Pick on which of those two things you value.
Not sure yet, or on a budget: ScreenZen. It costs nothing, and if friction turns out to be enough, you have saved a hundred dollars.
Happy with Opal but not the bill: Freedom does nearly the same job for $60 a year less. If what you want is one app that filters content rather than just scheduling it, Sunnah Lock is free on Android now, with Windows and iPhone on the way.
Frequently asked questions
Does Opal work on Android?
Yes, but not as well as on iPhone. Android has no equivalent to Apple's Screen Time API, so Opal's Android version enforces blocks through the Accessibility Service, carries ads on the free tier, and is looser than the iOS build.
What is the cheapest opal app alternative?
ScreenZen is free and funded by donations. Sunnah Lock is free on Android during its launch period. Among paid options, Cold Turkey at $39 once is the cheapest over any period longer than a year.
Can my child uninstall these apps?
Most of them, yes, in about thirty seconds through Android Settings. Sunnah Lock locks uninstall and disable behind a PIN. Cold Turkey is hard to remove but does not run on phones. ScreenZen and AppBlock offer almost no resistance.
Which blocks explicit content rather than just social media?
Sunnah Lock and BlockerX. The rest are productivity tools. They will block Instagram during work hours and do nothing about what arrives through a browser at midnight.
Is a free app blocker good enough?
It depends what you are fighting. Absent-minded scrolling, yes, friction usually handles it. Something you are deliberately seeking out, no. That needs a lock you cannot remove in the moment you want to remove it.
Do I still need Opal if I use one of these?
No. Every app here overlaps with Opal's core function. Running two blockers at once tends to cause conflicts through the Accessibility Service rather than doubling the protection.
The honest conclusion
Most people searching for an opal app alternative want the same thing at a lower price. Freedom is that, and it is the safe answer.
A good number are after something Opal never claimed to be. If you are trying to keep explicit content away from yourself or your family, a focus timer was always the wrong instrument. That is the gap Sunnah Lock was built for, and it is why I am comfortable putting my own app at the top of a list where I have also told you to go buy someone else's.
If you are on Android and the problem is explicit content, install Sunnah Lock. It is free right now and takes about five minutes to set up.
If you are on iPhone or Windows, put your email on the waitlist. Both builds are in development and early users keep a full year free. Use Freedom in the meantime; I would rather you were protected on something else than unprotected waiting on us.
Related reading: 5 best Cold Turkey alternatives in 2026, for the desktop side of the same problem.
Block it on your phone today
Apps, sites, keywords, Reels and Shorts. Locked behind a PIN so it holds in the weak moment. Free on Android during launch.
Get it free on Android