Opal and Munen both use Apple's Screen Time framework to put something between you and the apps you open on autopilot. They solve the same problem with different mechanics. This page lays those mechanics out so you can pick the one that matches how you actually fail with your phone.
The short version
- Opal blocks. You schedule focus sessions, choose how strict they are, and during a session the selected apps are closed to you. Outside sessions, the phone is normal.
- Munen slows. The selected apps stay reachable, but opening one goes through a short pause (up to 10 seconds at the default level) and a limited access window. How long the pause is, and how many minutes you get, depends on a zone that is recalculated every night from how you actually used those apps the day before. Munen names the five zones from Pause (hardest day) to Flow (best day). Munen has three intensity levels, Gentle, Balanced and Firm, and you pick the one you want (Gentle and Firm with Premium).
If you want a wall for specific hours of the day, Opal is built for that. If you want the resistance to track your recent behavior without locking you out, that is what Munen does.
Behind this is a different idea of who decides. Munen tries to hand the decision back to you, not make it for you: every setting that makes it stricter, the intensity level, the Hard-day contract or a focus session, is one you choose while calm, and Munen only holds it when the hard moment arrives. In Opal, a Deep Focus or Brick Mode session takes the decision away from you until it ends.
Side by side
| Munen | Opal | |
|---|---|---|
| Core mechanic | Adaptive friction: a pause of 0 to 10 seconds plus an access window of a few minutes (default level) every time you open a flagged app | Focus sessions that block selected apps, plus schedules, time limits, open limits, an Allow Only whitelist and Brick Mode |
| How strictness is set | Mostly automatically, from a zone updated once a day based on your usage of the apps you flagged. You pick the overall intensity (gentle, balanced, firm) and your Hard-day contract, and you can adjust your zone yourself (once a day free, every 4 hours on Premium) | Manually, per session (normal, timeout, deep focus) |
| Can you get in during a block or pause? | Yes, after the pause, for a limited number of minutes. There are two exceptions, both chosen by you: a focus session, which you can end whenever you want with one tap, after which the app goes back behind the usual pause, and Firm mode in the Hard-day contract, which does not open for that day | Depends on the session mode: Normal lets you cancel anytime, Timeout adds rising delays, Deep Focus has no early exit |
| What it measures | Only the apps you marked as distracting: time in them, late-night use, how often you open them, long sessions. Productivity apps do not affect your zone | Total screen time and app usage stats, plus a daily Score that combines Sleep, Focus and Rest |
| Bad day handling | Zone moves at most one step per day; downward moves only happen at the nightly recalculation, never mid-day | No automatic adjustment; you decide session length and strictness |
| Daily recovery | If you are in one of the two lowest zones and have had a genuine effort day by 8 pm, Munen lifts you one zone for the evening and keeps that floor the next morning | Not applicable |
| Journal and coaching | Usage journal and an AI coach that knows your week. Free: 3 coach messages and 1 AI reflection on a journal entry per week. Premium: generous use plus a weekly AI summary | Daily Score, streaks and rewards. Optional social features let you compare daily screen time with friends on a leaderboard |
| Impulse moment help | SOS screen when the urge hits: grounding steps free, AI-personalized response on Premium | Not a feature |
| Focus mode | On-demand focus sessions, unlimited. Scheduled sessions: 1 recurring schedule free, unlimited on Premium | Core feature, with Shortcuts automation |
| Setup per app | Pick apps once from the native picker (up to 3 apps free, unlimited on Premium) | Pick apps and build sessions |
| Shield | Native iOS shield | Native iOS shield with Opal branding |
| Account required | No for the free tier; only at checkout or first AI use | Yes |
| Where usage data lives | On the device; the zone is calculated on the device. Anonymous usage analytics are sent. AI features send what you write plus a summary of your week's numbers, only when you use them | Opal states detailed app usage stays on the device. If you opt in to social features, your daily total screen time goes to Opal's servers to be shared with confirmed friends |
| Platforms | iPhone | iPhone and Android |
| Free tier | Adaptive friction, zones, focus sessions with one recurring schedule, journal, streaks and achievements, SOS grounding, a weekly taste of the AI, 2 weeks of history, up to 3 apps | Limited free plan |
| Paid price | 4.99 USD/month or 39.99 USD/year, 14-day free trial on the monthly plan | 99.99 USD/year, 19.99 USD/month, 4.99 USD/week (App Store listing, Sept 2026) |
| Availability | 132 countries; not in the EU, UK, Switzerland or South Korea | Worldwide |
Where each one fits
You have a clear window you need protected. Work block from 9 to 12, no phone after 10 pm. Opal's scheduled sessions map directly onto that. Munen's focus mode can do a schedule too, but the rest of Munen is not built around fixed windows.
Your problem is the reflex, not the hour. You open Instagram forty times a day and each time it "just happened". Munen's pause targets the reflex itself, and because the zone follows your usage, a good week loosens the pause and a bad week tightens it. You can still step in and adjust the zone or the intensity when you want to.
You have uninstalled blockers before. Hard blocks work until the day you really want in, and that day the app usually gets deleted. Munen is designed on the opposite premise: you can get in, it just costs a pause and a few minutes, and the cost adjusts to your track record. If you do want a wall on your hardest days, Firm mode in the Hard-day contract is there, but you have to choose it.
You want the numbers. Opal reports total screen time and a daily Score built from Sleep, Focus and Rest, and can rank you against friends if you opt in. Munen's dashboard is narrower on purpose: it tracks the apps you flagged, your zone history, and the minutes you handed back early ("Your reclaimed life").
You care where the data goes. Both apps keep detailed app usage on the phone. Munen calculates your zone there too, and only the AI features send what you write and a summary of your week to a model, when you use them. Opal sends your daily total screen time to its servers only if you turn on social features to compare with friends.
Frequently asked
Can I use both? Technically yes, since both use Screen Time shields, but two shields on the same app get confusing fast. Pick one mechanic per app.
Does Munen ever block completely? Yes, in two cases, and you choose both. A focus session closes the flagged apps while it runs, on demand or on a recurring schedule, but you can end it whenever you want with one tap and the app goes back behind the usual pause. The Hard-day contract in Firm mode closes those apps for the whole day, with no way in, as you decided in advance. Outside those two cases, the app always opens after the pause. The contract's other two modes, Pause (the default) and Reminder, do not close the door.
Is Munen just one sec with extra steps? No. one sec asks for a breath before you open an app, at the same intensity every time, and on iOS runs through Shortcuts automations (one sec 6.0 on iOS 26 says it can add them for you). Munen's pause length and access minutes change with your zone, and you pick apps once. See Munen vs one sec.
Which one is cheaper? Munen's pause with its nightly adjustment, zones, focus sessions and journal are free, with a weekly taste of the AI. Its Premium tier is 39.99 USD/year, with a 14-day trial on the monthly plan. Opal's yearly plan is 99.99 USD as of September 2026.
Munen is free on the App Store. The friction engine and zones do not require an account or a subscription.
Opal is available at opal.so and on the App Store.
Adaptive friction is the category this comparison sits in. For the four kinds of digital friction, when each works, and how to tell whether yours is doing anything, see what adaptive friction is.