Opal vs. one sec: The Actual Referee Comparison (2026)

Opal and one sec are the two apps people actually argue about when they ask “what’s the best screen time app.” Both show up constantly in the same threads, the same App Store category pages, the same “best app blocker” roundups — and almost nobody puts them head-to-head, because most of the sites ranking for these terms sell one of them, or neither.

We sell neither. LockPact isn’t a solo blocker, so we don’t have a horse in the Opal-vs-one-sec race — which makes this a fair fight to referee. Every price and mechanic below is checked against each app’s live App Store listing this week, not recalled from an old comparison.

Quick comparison table

	Opal	one sec
Core mechanic	Scheduled blocking + Deep Focus (hard, bypass-resistant)	Breathing-delay friction before opening an app
Blocking strength	Hard block during focus sessions	Soft — a pause, not a wall
Social layer	Leaderboards, “challenge friends”	None built in
Free tier	Basic blocking, limited	One app, basic friction
Paid tier	$19.99/mo or $99.99/yr	$19.99/yr (individual)
Lifetime option	$399	$99.99 (individual), $149 (family)
Rating (as of writing)	4.7★, ~84K ratings	4.8★, 23K+ ratings
iOS requirement	iOS 18.0+	iOS 15.0+ (also macOS)
Platform	iOS, iPadOS, Mac	iOS, iPadOS, Mac

How Opal actually works

Opal blocks apps during scheduled focus sessions. You set a schedule — work hours, mornings, whatever — and the apps you’ve chosen are inaccessible for that window. Its signature feature is Deep Focus, a mode built specifically to resist the “just turn it off” move that undermines most solo blockers: once you’re in Deep Focus, ending the session early is deliberately harder than in a normal session.

Opal also leans into gamification — leaderboards and the ability to challenge friends on screen time stats. That’s a social layer, but it’s visibility, not control: friends can see your numbers, not approve or deny your access to anything.

Per its current App Store listing, Opal’s paid tier runs $19.99/month or $99.99/year, with weekly options around $4.99–$9.99 and a $399 lifetime purchase. The free tier gives you basic blocking with real limitations — Deep Focus and the fuller feature set sit behind the subscription.

How one sec actually works

one sec takes the opposite approach: instead of blocking anything, it inserts friction. Open a configured app and you hit a breathing-exercise interstitial — a deliberate pause designed to interrupt the automatic, unconscious reach for the app before you’re actually inside it. The developer’s own claim is roughly a 57% average reduction in usage of the apps it’s applied to. one sec also has a “Re-Intervention” feature that kicks you back out after a set time (e.g., five minutes), forcing another pause if you want to keep going.

There’s no hard block anywhere in the mechanic. You can breathe through the delay and open the app every single time, if you choose to. one sec is betting that the moment of conscious pause is often enough on its own — and for impulsive (not compulsive) checking, that bet is frequently right.

Per its current App Store listing, one sec’s individual Pro plan is $19.99/year, with a $99.99 lifetime option. There’s also a family plan at $3.99/month or $29.99/year, and a $149 family lifetime. The free tier covers one app with basic friction — enough to try the mechanic before paying for full coverage.

Where Opal wins

You want something that actually stops you, not just slows you down. Deep Focus is a real hard block during a session — the closest thing to enforcement either app offers. If friction alone isn’t cutting it and you need the app to be genuinely inaccessible for a window of time, Opal’s mechanism is built for that in a way one sec’s isn’t.

You’re motivated by competition and stats. The leaderboard and friend-challenge features give Opal a game-like pull that one sec doesn’t attempt. If streaks and rankings keep you engaged, that’s a real point in Opal’s favor.

You want it to cover a laptop too. Both apps run on Mac, but Opal’s blocking-based model translates more directly to desktop focus sessions than one sec’s mobile-first friction pattern.

Where one sec wins

Price. $19.99/year for the individual plan is a fraction of Opal’s $99.99/year — and one sec’s free tier, while limited to one app, is fully-featured on that one app rather than a stripped-down trial.

You want awareness, not restriction. If your actual goal is “catch myself before I doomscroll,” not “make it physically impossible to open Instagram,” one sec’s pause-and-reconsider model matches the problem more precisely than a hard block does.

Design and polish. one sec’s breathing-animation interstitial is widely regarded as one of the more elegantly designed frictions in the category — it doesn’t feel punitive, which matters for people who disengage from anything that feels like a scolding.

It’s honest about being a soft tool. one sec doesn’t pretend to stop you. That’s a feature, not a limitation, for the sizable group of people who find hard blocks feel like a fight they eventually lose anyway, and who do better with a nudge they can act on themselves.

A real-world scenario

Say you check Instagram compulsively during the workday — not because you decided to, but because your thumb does it before your brain weighs in.

With one sec: every open triggers a breathing pause. Four times out of five, that pause is enough — you close the app, mildly annoyed at yourself, and get back to work. The fifth time, you’re genuinely stressed or avoiding something, and you breathe through the delay and open Instagram anyway. One sec did its job for the impulsive opens; it couldn’t touch the compulsive one.

With Opal: during your scheduled focus block, Instagram simply isn’t there. No decision to make, no pause to breathe through — the option doesn’t exist for the length of the session. That handles the compulsive case Opal-style, but only for the hours you scheduled; outside the block, you’re back to relying on yourself.

With neither: the fifth open — the one neither app was built to stop — is the one where an actual person, not a setting, deciding whether you get back in changes the outcome. That’s a different mechanism than either app offers, and it’s the gap both of them share.

The gap neither one closes

Opal and one sec solve different halves of the same problem — one restricts, one interrupts — but they share a structural limit: whoever configures the block is also the only person who can remove it. Opal’s Deep Focus makes removing it harder. one sec’s friction makes removing it slower. Neither one hands the decision to somebody else.

That’s the piece apps that let a friend control your screen time are built around: instead of engineering a better lock for you to pick, a real person — a partner, not a setting — decides whether you get back in. LockPact is the mutual version of that idea: you and a partner each lock apps on your own device, and only the other person can approve an unlock request. It’s not a harder version of Opal or a smarter version of one sec. It’s a different lever entirely — social cost instead of engineering.

If you’ve tried both Opal and one sec and still find yourself overriding whatever’s in your way at 11pm, that’s worth noticing. It’s not that you need a stricter block or a longer breathing animation. It’s that the enforcer and the person being enforced are still the same person, no matter which of the two you pick.

Frequently Asked Questions

Which is better, Opal or one sec?

Neither is objectively better — they solve different problems. Opal is closer to real enforcement (Deep Focus is a hard block); one sec is closer to pure awareness (a pause you can always breathe through). If you need something that physically stops you during set hours, Opal fits. If your problem is impulsive, unconscious opens you’d catch yourself on with a moment’s pause, one sec is the more precise (and far cheaper) tool.

Is Opal worth $99.99/year over one sec’s $19.99/year?

Only if you specifically need Deep Focus’s hard-block enforcement or the cross-device leaderboard/social layer. If awareness-level friction is enough for your use case, one sec does the job for about a fifth of the price.

Can you use Opal and one sec together?

Yes — some people run one sec’s friction on apps they’re trying to moderate and Opal’s Deep Focus on apps during scheduled work blocks. They’re not mutually exclusive, though most people settle on one primary tool once they see which mechanism actually holds for them.

Do either of these apps involve another person?

Not in an approval sense. Opal’s leaderboards and one sec’s lack of any social feature both mean the decision to override stays entirely with you. Neither app hands anyone else a key. For that, see our comparisons of Opal vs. LockPact and one sec vs. LockPact.

Which is cheaper long-term?

one sec, by a wide margin. Its $99.99 individual lifetime purchase costs about what one year of Opal’s subscription does, and its $19.99/year plan is roughly a fifth of Opal’s $99.99/year.