What is verified, side by side
Five rows. Three of them we can stand behind on both sides, and two are the whole argument of this page and could not be checked against Freedom’s own pages. A dash in the Freedom column means we could not verify it, not that Freedom cannot do it. We would rather leave a cell empty than print a guess about somebody else’s product.
Swipe the table sideways to see every competitor
| 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.
About Forest, honestly: this page does not compare against Forest, because we could not verify Forest. Its own public listing was not readable on 30 September 2026, so we have no verified claims about what it blocks, where it runs, what it costs, or whether it does anything to teach. The one sentence elsewhere on this page that calls it a pomodoro-style focus timer rather than a blocker is the general shape of a pomodoro app, it is marked as unverified where it appears, and it is not a claim about Forest that we checked.
If you are choosing between Popcue and Forest, we are the wrong source. Read Forest’s own listing and its pricing directly, and treat anything you have read here as unverified.
What Freedom’s pricing page documents
Read on 30 September 2026, and quoted rather than paraphrased because this is the only source on this page we could actually open.
- Free
- A $0 tier, listed on the pricing page as the entry point.
- $3.33 a month, billed yearly
- The annual-billing monthly figure as listed on 30 September 2026.
- $8.99 a month, billed monthly
- The month-to-month figure as listed on 30 September 2026.
- $99.50 lifetime
- The one-off lifetime figure as listed on 30 September 2026.
- Blocks sync across Mac, Windows, iOS, Android and Chromebook
- Freedom’s pricing page states that blocks sync across all five. This is the verified advantage on this page, and Popcue has no answer to it.
Where Forest or Freedom is better
The first of these is a genuine advantage and the rest are close to genuine. This section is the reason the page exists.
- Freedom keeps a block going across five platforms at once. Mac, Windows, iOS, Android and Chromebook, from one set of rules. Popcue runs on Android and web, has no desktop app, has no iOS app, and syncs nothing. If your distraction is at a desk rather than in your hand, this is the row that decides it, and it is not close.
- Freedom’s price is documented and starts at nothing. $0, $3.33 a month billed yearly, $8.99 a month billed monthly, or $99.50 lifetime. Popcue is free from your own tools and Pro is ₹149 a month or ₹999 a year. Freedom prices in US dollars and Popcue in rupees, so compare them at the exchange rate on the day; Pro does not buy you a second platform.
- A schedule is a different instrument from a ratio. If your failure mode is a predictable window, a block you set once in the morning is a stronger tool than one that fires on five launches in ten. Popcue’s ratio is deliberately the softer of the two bets.
- Forest, in principle, solves a different problem again: a pomodoro timer. A timed session you sit through is the right shape for a defined block of deep work, which is not the problem Popcue is built for. Treat that as unverified: it is the general shape of a pomodoro app, and we could not read Forest’s own listing to confirm anything about Forest itself.
- Freedom is not a quiz. Neither is Forest, as far as we can tell, and that is the point of the next section rather than a concession in this one. If you are not trying to remember anything specific, a blocker that never asks you a question is doing a cleaner job than one that does.
Where Popcue is better
The same number of points. Almost all of them are one point: a timer produces an absence, and Popcue produces a retrieval.
- A question, from material you already keep. Notion, AnkiDroid, or any MCP-compatible LLM endpoint you already run, read live and free with no cap on how many you connect. A blocked hour does not hand you anything to remember.
- The answer is graded and the grade schedules the next card. Two taps, reveal then rate, and the rating updates SM-2: sooner if you missed it, later if you got it. Freedom and Forest give you an uninterrupted stretch of time and no record of what happened in it.
- A ratio of launches, not a timer you can sit through. Five out of ten by default, randomized within the ratio, set per app, with active hours per app and per goal. You do not have to decide in advance to sit down, which is the moment most plans die.
- Eight card types rather than one session shape. Basic, cloze, choice, true or false, image, code, list and picture, because a vocabulary item and a fact you hold confidently do not want the same question.
- Two Android permissions and nothing else. Usage access, so it knows an app you picked just opened, and draw over other apps, so the card is what is on screen. It does not use the AccessibilityService API, and it reads nothing about what happens inside the apps.
- Free without a schedule to keep. No block to define, no timetable to maintain, no account to sync. Set a ratio and forget about it until you want it changed.
Who should pick which
- Pick Freedom if
- Your time is split between a phone and a computer, because a block that follows you onto a Mac is worth more than one that stops at the handset. A documented price that starts at free is a reasonable bonus, not the reason.
- Pick Popcue if
- You are on Android or web, and what you are actually trying to do is remember something specific. You have notes already written somewhere, and you would rather be asked about them at the moment you reach for the feed than sit through a quiet hour.
- Decide about Forest yourself
- We could not verify Forest, so we are not going to argue against it. If a pomodoro timer is what you are after, that is a different category from both of these, and it is not one Popcue is trying to beat.
Where this came from
One source for Freedom, freedom.to/pricing, read on 30 September 2026. No source for Forest, because its own listing could not be read on that date, which is why this page is shorter and blunter about its limits than the other three comparisons. Popcue is not affiliated with either. If you own one of them and something here is wrong, tell us and we will change it and move the date.
Three questions
Is Freedom or Forest better than Popcue?
For cross-device use, yes, and by a real margin. Freedom syncs a block across Mac, Windows, iOS, Android and Chromebook, which Popcue cannot do at all: Popcue is Android and web, with no desktop app. Freedom’s pricing page also lists a free tier, $3.33 a month billed yearly, $8.99 a month billed monthly, and $99.50 lifetime.
What neither Forest nor Freedom does is put study content in front of you or schedule a review, which is the whole of Popcue’s case.
Do Forest and Freedom sync across devices?
Freedom does, according to its own pricing page, which we read on 30 September 2026: blocks sync across Mac, Windows, iOS, Android and Chromebook. Forest’s cross-device behaviour could not be verified, so this page makes no claim about it.
Popcue does not sync: it runs on Android and web, and a block set on one device does not follow you to another.
Do Forest or Freedom show you study material or schedule reviews?
We could not verify this for either one, so we will not claim it either way. What the category generally is, and what we can see on the pages we did read, is timers and schedules: a block you set in advance, or a pomodoro-style session you sit through.
Popcue interrupts a ratio of launches with a question from your own notes, rates whether you remembered it, and schedules the next one with SM-2. If you want the second thing, this page is for you; if the first, they are the ones to read about.