# Flow Breath vs 瞬息睡眠

Flow Breath and 瞬息睡眠 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Flow Breath sells 4 in-app purchases, starting at $3.99 per 7 days and 瞬息睡眠 sells 2 in-app purchases, starting at $10.99 per month. Whichever you choose, the download price is not the number that matters.

Flow Breath ships an update fortnightly, 瞬息睡眠 every 4 weeks. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Flow Breath | 瞬息睡眠 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 weeks |
| Size | 80 MB | 144 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Ivan Terekhin](https://appshunter.io/developer/888645337) | [玥 邓](https://appshunter.io/developer/1556261538) |

## What reviewers say

### Flow Breath

[App page](https://appshunter.io/ios/app/flow-breath-breathing-timer/id6756208822)

**Features:** macOS Compatibility, Vision Pro support, iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flow Breath Pro - Weekly | $3.99 | per 7 days |
| Flow Breath Pro - Monthly | $6.99 | per month |
| Flow Breath Pro - Yearly | $19.99 | per year |
| Premium | $29.99 | one-time |


### 瞬息睡眠

[App page](https://appshunter.io/ios/app/id6762373331)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stillnest Monthly | $10.99 | per month |
| Stillnest Annual | $59.99 | per year |


## Frequently asked questions

### Is Flow Breath free?

Flow Breath is free to download, with in-app purchases available.

### Is 瞬息睡眠 free?

瞬息睡眠 is free to download, with in-app purchases available.

### Do Flow Breath or 瞬息睡眠 have ads?

Neither Flow Breath nor 瞬息睡眠 shows ads.

### Which is updated more often, Flow Breath or 瞬息睡眠?

Flow Breath ships an update fortnightly, and 瞬息睡眠 every 4 weeks. Most recently, Flow Breath was updated on November 9, 2026 and 瞬息睡眠 on November 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*