# Napping vs StressFlow

The clearest difference is in-app purchases: Napping at none against StressFlow's 2. StressFlow's advantage is update cadence (every 6 weeks vs every 31 months) and iOS requirement (13.0 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. StressFlow sells 2 in-app purchases, starting at $2.99 per month. Napping asks for nothing beyond the download.

Napping ships an update every 31 months, StressFlow every 6 weeks. The most recent releases landed on October 3, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Napping | StressFlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 31 months | **Every 6 weeks** |
| Size | 3 MB | 45 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [Hangzhou HeiChe Technology Co., Ltd](https://appshunter.io/developer/1421830285) | [Huai 'an Fingertip Time Technology Co., LTD](https://appshunter.io/developer/1620298666) |

## What reviewers say

### Napping

[App page](https://appshunter.io/ios/app/napping/id1658785488)

**In-app purchases:** none


### StressFlow

[App page](https://appshunter.io/ios/app/stressflow-hrv/id6648786704)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 高级连续包月会员 | $2.99 | per month |
| 高级连续包年会员 | $4.99 | per year |


## Frequently asked questions

### Is Napping free?

Napping is free to download, with no in-app purchases.

### Is StressFlow free?

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

### Do Napping or StressFlow have ads?

Neither Napping nor StressFlow shows ads.

### Which is updated more often, Napping or StressFlow?

Napping ships an update every 31 months, and StressFlow every 6 weeks. Most recently, Napping was updated on October 3, 2026 and StressFlow on October 6, 2026.

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