one sec vs Opal: which one actually stops the scroll?
Prices and ratings from the US App Store, checked on 2026-09-13. We build Cortex app; the verdict above is the same one we’d give a friend.
one sec adds friction (a pause) and respects your autonomy; Opal blocks and is hard to bypass. Pick one sec for gentle habit-breaking, Opal for hard limits. Cortex app is a third option that keeps one sec’s pause, adds an intention question, a brain workout and a daily score, and costs less.
These are the two apps everyone compares, and they are not the same product. one sec is a pause: when you open Instagram it makes you breathe (or type, or wait) and then lets you in. Opal is a wall: it blocks apps on schedules, and its Deep Focus mode takes several deliberate steps to override. One respects your autonomy; the other protects you from it.
Both are excellent at what they do. one sec has peer-reviewed studies with the Max Planck Institute, runs on iPhone, iPad, Mac and Android, and costs $19.99 a year. Opal has 88,000 US ratings, website blocking, focus sessions and a community, requires iOS 18, and costs $99.99 a year. Which one you need depends on how you fail: if you open apps on autopilot, a pause fixes it; if you open them on purpose and regret it, a wall does.
| one sec | Opal | Cortex app | |
|---|---|---|---|
| Approach | Pause | Hard block | Pause + intention question |
| Hard to bypass | No (by design) | Yes (Deep Focus) | No (by design) |
| During the pause | Breathing, effort exercises | — | Breathing, typed math, trivia, your own numbers |
| Daily score | No | Partial | 0–100, resets at midnight |
| Blocks websites | Yes | Yes | No |
| Platforms | iPhone, iPad, Mac, Android | iPhone | iPhone |
| Minimum iOS | iOS 15 | iOS 18 | iOS 17 |
| Yearly | $19.99 | $99.99 | $14.99 |
| Monthly | $2.99 | $19.99 | $3.99 |
| Free tier | Limited | Limited | 1 app, full features |
| Published research | Yes | No | No |
| US App Store rating | 4.8 ★ · 24K | 4.7 ★ · 88K | See App Store |
Pick one sec if…
- You want to keep the final say every time.
- You need it on Android, iPad or Mac too.
- Research backing matters to you.
Pick Opal if…
- You need to be locked out in the evenings, before exams, or on deadlines.
- You’ve tried pauses and always tap through.
- You want website blocking and focus sessions in one place.
The third option: Cortex app
- Keeps one sec’s pause, adds “why are you opening this?” and a five-second brain workout (math, trivia, mirror).
- One number that tells you if it’s working: 0–100, +1 per resist, −2 per continue, reset at midnight.
- $14.99 a year, free for one app, iOS 17 or later.
Cortex app vs one sec → · Cortex app vs Opal →
one sec vs Opal: which one actually stops the scroll? — FAQ
Is Opal worth $99.99 a year?
If blocking is what you need — evenings, exams, deadlines — yes, it is the most complete blocker on iPhone. If your problem is autopilot opens rather than deliberate ones, a pause app at $15–20 a year does the job.
Can I use one sec and Opal together?
People do: Opal for scheduled blocks, one sec for the rest of the day. Two shields on the same app at the same time is a bad experience, so split by app or by time.
Where does Cortex app fit?
On the one sec side of the line — a pause, never a block — with three additions: the intention question, the brain workout inside the pause, and a daily score. It is also cheaper per year than either.
4.9 ★ · 117 ratings on the App Store · iOS 17+