Calm Moments compared with one sec, Opal and ScreenZen
one sec, Opal and ScreenZen put something between you and an app: a pause or a lock. Calm Moments changes where the scroll goes instead. It is an endless feed of slow scenes, so the habit carries on and stops costing anything.
Its optional door adds a limit, but as an offer rather than a wall: carrying on is always one tap.
We make Calm Moments. The other three are described the way they describe themselves, as of October 2026, and we have tried to be fair about where they are the better choice.
The real difference
The three apps ask you to stop, more or less firmly. one sec and ScreenZen ask gently, with a pause before the app opens. Opal asks firmly, with a block that can be made impossible to end early. All three work on the moment of opening.
Calm Moments works on what happens after it. The thumb still moves, the feed is still endless, but what arrives is a slow wave or a drift of snow rather than the next thing designed to keep you. There is nothing to resist, so there is nothing to give in to. That idea has a name: calm scrolling.
Side by side
| one sec | ScreenZen | Opal | Calm Moments | |
|---|---|---|---|---|
| Approach | Pause before opening | Pause, limits, blocks | Blocking on a schedule | Replace the scroll |
| Getting past it | Always possible after the pause | Depends on the mode | Can be made impossible | Nothing to get past; the door is one tap |
| Limit for other apps | Yes | Yes | Yes | Optional, 10 to 45 minutes |
| Cost | Free, paid Pro | Free, donations | Free tier, paid Pro | Free, nothing to buy |
| Platforms | iPhone, Android | iPhone, Android | iPhone, Android | iPhone only |
Calm Moments and one sec
These two are the closest in spirit. Both are gentle, and both believe the decision should stay yours. one sec makes the moment of opening visible, which is exactly right if the problem is opening Instagram forty times a day without meaning to. Calm Moments assumes you will reach anyway and gives the reach somewhere better to land, which suits the long evening scroll more than the quick reflex.
Calm Moments and ScreenZen
ScreenZen covers a lot of ground for free: pauses, daily limits, a cap on opens and stricter scheduled blocks. If you want fine control over other apps, it offers far more than Calm Moments does. Calm Moments has one setting for other apps, the door, and puts the rest of its effort into the feed itself.
Calm Moments and Opal
These are the furthest apart. Opal is built for protected hours, and if you need three hours of study with no way out, a hard block is the honest tool. Calm Moments is built for the hours that cannot be protected: on the sofa, in a queue, late at night, when a block would simply be switched off.
When another app is the better choice
- You use Android. Calm Moments is iPhone only.
- You want detailed control over many apps: ScreenZen.
- You need a block you genuinely cannot break: Opal.
- The problem is opening apps without meaning to: one sec.
Using them together
They do not compete for the same moment, so pairing works well. A pause or a block keeps the working day clear, and Calm Moments is there for the scroll that happens anyway. If you only want one app, the door covers a simple limit, without the wall.
Calm Moments works alongside any of them. Free, no ads, no account, collects no data.
Common questions
What is the difference between Calm Moments and one sec?
one sec pauses you before an app opens and asks whether you still want to go in. Calm Moments does not interrupt anything: it gives you an endless feed of slow scenes to scroll instead. one sec works on the reflex of opening, Calm Moments on the scroll itself.
Is Calm Moments a free alternative to Opal?
It is free, but it is a different kind of app. Opal blocks apps, and its strictest blocks cannot be ended early. Calm Moments blocks nothing. It replaces the scroll with a calm feed, and its optional door offers a pause after a limit you set, with carrying on always one tap away.
Can I use Calm Moments together with a blocker?
Yes. They work on different moments. A blocker or a pause app protects the hours you choose, and Calm Moments is somewhere calm for the scrolling that happens anyway.