# HydroApp vs Nafas

The clearest difference is in-app purchases: HydroApp at none against Nafas's 2. HydroApp also leads on iOS requirement (13.0 vs 15.0). Nafas's advantage is update cadence (every 3 months vs every 20 months). On price, ads and device support there is nothing between them.

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

HydroApp ships an update every 20 months, Nafas every 3 months. The most recent releases landed on September 13, 2026 and July 21, 2026 respectively.

## The numbers

| Metric | HydroApp | Nafas |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/nafas/id1551852016/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 3 months** |
| Monetization | — | Free with in-app purchases |
| Size | 9 MB | 44 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TETE EN L'AIR](https://appshunter.io/developer/1446541556) | [BreathLife](https://appshunter.io/developer/1551852018) |

## What reviewers say

### HydroApp

[App page](https://appshunter.io/ios/app/hydroapp/id1446541557)

**Features:** macOS Compatibility

**In-app purchases:** none


### Nafas

[App page](https://appshunter.io/ios/app/nafas/id1551852016)

This app guides users through slow breathing exercises to combat hyperventilation, reduce anxiety and depression, and improve sleep quality. It offers various levels based on your current breathing rate, including a specific mode for falling asleep.

**Highlights:** Slow breathing exercises, Anxiety and depression reduction, Improved sleep quality, Adjustable breathing levels, 4-7-8 sleep mode, Hyperventilation management

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium mode Monthly | $2.99 | per month |
| Lifetime premium mode | $5.99 | one-time |


## Frequently asked questions

### Is HydroApp free?

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

### Is Nafas free?

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

### Do HydroApp or Nafas have ads?

Neither HydroApp nor Nafas shows ads.

### Which is updated more often, HydroApp or Nafas?

HydroApp ships an update every 20 months, and Nafas every 3 months. Most recently, HydroApp was updated on September 13, 2026 and Nafas on July 21, 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.*