Opal is the better blocker. Popcue is the better teacher.

Opal is a better app blocker than Popcue, and pretending otherwise would be the easiest lie to tell on this page. It is polished, it is award-winning, it runs on every platform, and its Hard Mode does the one thing Popcue has deliberately decided never to do. Popcue is only better if the card is the part you actually want.

Last reviewed 1 October 2026

Popcue vs Opal, in short

Opal schedules hard blocks on a timetable, including a Hard Mode its own site describes as “no way out, you can’t turn Opal off”, and it tracks a daily Opal Score. It shows no study content, because there is nothing to show: the block is a wall, and the time you spend against it is yours. Popcue interrupts a ratio of app launches with a recall card from your own notes instead. It has no Hard Mode, no scheduled lockdown, and no focus score.

So the two are not doing the same job. Opal answers “how do I make it impossible to open that at 9pm”, which it answers very well. Popcue answers “what was the thing I was reading at 9pm”, which Opal does not answer at all. If your problem is the first one, Opal is the better product and this page will not change your mind.

Three honest gaps in Popcue’s column: Popcue does not block websites, it has no iOS version, and it has no scheduled hard lockdown. All three are things Opal does well and one of them is a gap we are not going to paper over.

The short table

Nine rows, pulled from the full matrix on the comparison page. One of them is a tick for both products, and it is worth reading twice: no skip control on either step is a tick for Opal because Hard Mode is stricter than anything Popcue can do, not because the two mechanisms are alike.

Swipe the table sideways to see every competitor

Feature comparison between Popcue and ten competing app blockers, verified 2026-10-01
Feature	Popcue	One Sec	Hopopop	Opal	ScreenZen	FocuzPass	App Pause	Study Lock	AnkiBlock	Tok Blok	LLLock
Wraps any app you choose	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Puts a question in front of you before you get in	Yes	Partly	Yes	No	Partly	Yes	No	Yes	Yes	Yes	Yes
The question comes from material you already keep	Yes	No	No	No	No	No	No	No	Yes	No	No
Works from a live tool, not an exported file	Yes	No	No	No	No	No	No	No	Yes	No	No
Interrupts at a per-launch ratio, not a daily quota	Yes	No	No	No	No	No	No	Yes	No	No	Yes
No skip control on either step	Yes	Partly	Partly	Partly	Partly	No	Yes	Partly	Partly	Yes	Yes
Spaced repetition scheduling	Yes	No	No	No	No	No	No	No	Partly	No	Partly
Usable free, with no subscription	Yes	Partly	Partly	Partly	Yes	Yes	Yes	Partly	Yes	Partly	Partly
Android	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	No	Yes
iOS	No	Yes	Yes	Yes	Yes	No	No	Yes	No	Yes	Yes
Blocks websites	No	Yes	No	No	No	No	Yes	No	No	No	No

What “partly” means, and where each claim was checked

One Sec: Puts a question in front of you before you get in: One Sec documents a Lengo vocabulary integration and a conversational reflection prompt, so it can add a study step. Neither asks you something drawn from your own notes.
ScreenZen: Puts a question in front of you before you get in: ScreenZen lets you write a custom prompt to answer before unlocking. That is a prompt gate rather than graded recall: there is no answer to get right.
One Sec: No skip control on either step: One Sec’s interventions are designed to be stepped through, but a reflection prompt is an activity rather than graded recall. There is no answer to get right and then rate.
Hopopop: No skip control on either step: Hopopop is the closest thing to Popcue in this category, and its questions are built in: mental arithmetic at three difficulty levels, general knowledge across ten-plus categories, and a geography map quiz. Its own support page documents the skip: you can skip after three attempts, you earn no XP for it, and the app stays blocked for the rest of that session. The gate is real and it is not graded recall of anything you wrote.
Opal: No skip control on either step: Opal has a Hard Mode its own site describes as "no way out, you can’t turn Opal off". That is stricter than Popcue, and it is worth knowing that is the trade you are making.
ScreenZen: No skip control on either step: ScreenZen documents a limited number of unlocks, so the gate holds. The prompt is self-graded, so nothing records whether you got it right.
Study Lock: No skip control on either step: Study Lock earns screen time back by answering correctly, so the gate is real. But it is a time debt, not a block. Get it wrong and you owe more time, which is a different mechanic from Popcue’s.
AnkiBlock: No skip control on either step: AnkiBlock offers a 60-second temporary unlock, up to three times a day. This is the clearest no-skip difference in the table, and AnkiBlock’s own listing documents the bypass plainly.
AnkiBlock: Spaced repetition scheduling: AnkiBlock schedules nothing itself. It delegates to AnkiDroid, so it inherits SM-2 from the deck you already keep.
LLLock: Spaced repetition scheduling: LLLock repeats words before you would forget them. It does not document which algorithm it uses.
One Sec: Usable free, with no subscription: One Sec blocks one app free and sells the rest. Its own pricing page returned a 404 at the date above, so no figure is quoted here.
Hopopop: Usable free, with no subscription: Hopopop documents a seven-day trial with no card needed, and no permanent free tier anywhere on its site. Its pricing is quoted in euros, and the figures differ between its own support page and its own store listing, so none are reproduced here.
Opal: Usable free, with no subscription: Opal allows one rule free. The rest is $99.99/year, $239/year, or $399 lifetime.
Study Lock: Usable free, with no subscription: Study Lock is free up to an allowance, then $34.99/year or $5.99/month.
Tok Blok: Usable free, with no subscription: Tok Blok has a free tier and a seven-day trial. The App Store lists monthly and yearly subscriptions plus coin packs, and its own blog quotes a different annual price than the store does, so neither figure is repeated here.
LLLock: Usable free, with no subscription: LLLock has in-app purchases. Its exact price was not verifiable at the date above.

Every capability claim above was checked on 2026-10-01 against the product’s own public listing: One Sec, Hopopop, Opal, ScreenZen, FocuzPass, App Pause, Study Lock, AnkiBlock, Tok Blok, LLLock. We are not affiliated with any of them. If something here is out of date, tell us and we will correct it and change the date.

The tick on “no skip control on either step” is not a compliment to Opal; it is a warning. Opal has a Hard Mode its own site describes as “no way out, you can’t turn Opal off”. Popcue cannot stop you turning it off, has no password, and has no mechanism for refusing a request to be disabled. If you are the kind of person who has already tried every other blocker and uninstalled it in a bad hour, that is a feature and you should want it. If you want a door that does not open from the inside, you want Opal, and Popcue is the wrong choice.

Where Opal is better

Opal wins on more rows of this page than Popcue does. They are listed first, and they are not close calls.

Hard Mode. A block Opal will not let you talk your way out of. Popcue has no equivalent and will not ship one: its answer to a person in a bad moment is a lower ratio, active hours, or turning it off from Settings, because a tool you cannot escape is a tool some people cannot use.
Scheduled blocks on a timetable you set once. If your failure mode is “I sit down at 9pm and the feed wins every time”, a standing schedule is a stronger instrument than a randomized ratio, because it does not depend on you resisting anything in the moment.
Every platform. iPhone, iPad, Mac and Android, with your rules and history moving between them. Popcue is Android and web, and has no iOS version at all.
A daily Opal Score. One number per day, which is easy to look at and easy to let go of. Popcue gives you recall against an SM-2 schedule instead, which is a different and less legible kind of number, and it does not pretend to be the same thing.
Craft, and evidence of it. Opal’s own site claims a 4.8 rating with more than 150,000 app ratings, and it has won an Apple Design Award. Popcue has no public ratings, no reviews and no installs, because it is not on the Play Store yet.
A price that is documented, and a free way in. One rule free, then $99.99 a year, $239 a year or $399 lifetime, with students up to 50% off. If that is affordable, it is not a reason to choose Popcue instead.

Where Popcue is better

The same number of points. This is a shorter list than it looks, because the rows it wins on are all the same row: the card.

Opal never shows you study content. This is the whole difference and everything else on this page is downstream of it. Its block is a wall; you spend the blocked time however you happen to spend it.
Your cards come from where you already keep notes. Notion, AnkiDroid, or any MCP-compatible LLM endpoint you already run, read live rather than exported, and free with no cap on how many you connect, on every tier.
The answer is graded, and the grade schedules the next one. Two taps, reveal then rate, and the rating updates SM-2: sooner if you missed it, later if you got it. Opal records that you were blocked; it does not record what you remembered.
A ratio, not a schedule and not a daily budget. Five out of ten launches by default, randomized within the ratio, set per app, with active hours per app and per goal.
Getting out is free and instant. Pause any app, set a ratio to zero, or turn the whole thing off from Settings. No email, no support ticket, and no fee for getting back into your own blocker. Opal Hard Mode is the opposite trade, deliberately.
It is free at a price that scales down. Popcue is ₹0 for anyone whose cards come from their own tools; Pro is ₹149 a month or ₹999 a year and exists mainly to lift the AI-path cap. Opal’s entry point is one rule.

What Popcue does not do

Three of the gaps on this page are the same three gaps, so they are worth stating in one place rather than scattered.

Popcue does not block websites. The wrap mechanic is Android-app-shaped today. Browser blocking is on the roadmap and is not shipped.
Popcue has no iOS version, and none is scheduled. iOS restricts what a third-party app can present over another app, which makes a genuine full-screen interrupt much harder. We would rather ship one platform properly than hint at a date we cannot stand behind.
Popcue has no scheduled hard lockdown. There is no timetable of blocked hours, no Hard Mode, and no way for Popcue to refuse to be switched off. Popcue interrupts a share of launches during the hours you nominate. If you need the door to be unopenable, Opal is built for exactly that and this page is not going to argue otherwise.

Who should pick which

Pick Opal if: You want to be stopped rather than taught. You are on a Mac or an iPhone, or you want your block to follow you between devices. You have tried softer blockers and uninstalled them, and you want something that will not negotiate. On every one of those points Opal is the better product and this page will not pretend otherwise.
Pick Popcue if: The thing you are trying to do is remember something, and you are willing to be asked about it in the moment you are about to forget. Your material is already in Notion, AnkiDroid or an LLM you run, and you would rather not export it, re-import it, or maintain a second copy somewhere.
Pick both, if you can afford it: They are not rivals in the same slot. A scheduled hard block from Opal and a recall card from Popcue are two different instruments, and nothing here stops you using the one that suits the hour you are in.

Where this came from

Opal’s own public pages, read on 30 September 2026, with the pricing figures taken from opal.so/pricing: one rule free, then $99.99 a year, $239 a year or $399 lifetime, and students up to 50% off. The platform list, the Hard Mode wording and the rating and awards claims come from Opal’s own site, and we are quoting what it says about itself rather than endorsing it. Popcue is not affiliated with Opal. If you own Opal and something here is wrong, tell us and we will change it and move the date.

Three questions

Is Opal better than Popcue?

As a blocker, yes. Opal schedules hard blocks on a timetable, runs on iPhone, iPad, Mac and Android, tracks a daily Opal Score, and has a Hard Mode its own site describes as no way out.

Popcue is better at one thing Opal does not do at all: it asks you a question from material you already keep and makes you answer it before the app opens, and that answer is scheduled for review.

What is Opal Hard Mode, and does Popcue have one?

Opal’s Hard Mode is a block its own site describes as no way out, meaning you cannot turn Opal off while it runs. Popcue has no equivalent, and would not ship one.

Popcue’s answer to a person in a bad moment is a lower ratio, active hours, or turning it off from Settings with no email, no support ticket and no fee. If you want a door that does not open from the inside, that is Opal and it is a legitimate choice.

How much does Opal cost?

Opal’s own pricing page lists one rule free, then $99.99 a year, $239 a year, or $399 lifetime, and students up to 50% off. Those figures were read on 30 September 2026.

Popcue is free forever for anyone whose cards come from Notion, AnkiDroid or their own LLM, with no cap on how many they connect, and Pro is ₹149 a month or ₹999 a year.

Where to go next

The full comparison Eleven rows, ten rivals, and the row where Popcue says no. Popcue vs One Sec Friction against recall, plus the patent, the install count and the Safari extension One Sec has and Popcue does not. How Popcue works The per-launch ratio, the two taps, and what SM-2 does without the jargon. Frequently asked questions Permissions, iOS, the skip button, and getting your phone back.