# Fast vs Nature

The clearest difference is in-app purchases: Fast at none against Nature's 2. Fast also leads on update cadence (every 2 weeks vs every 3 months). Nature's advantage is iOS requirement (15.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Nature sells 2 in-app purchases, starting at $19.99 per 6 months. Fast asks for nothing beyond the download.

Fast ships an update every 2 weeks, Nature every 3 months. Both last shipped on October 30, 2026.

## The numbers

| Metric | Fast | Nature |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Size | 35 MB | 36 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [CodeHive](https://appshunter.io/developer/1196672412) | [JP HowardMD Inc](https://appshunter.io/developer/1853334154) |

## What reviewers say

### Fast

[App page](https://appshunter.io/ios/app/fast-intermittent-fasting/id6741595659)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Nature

[App page](https://appshunter.io/ios/app/nature-rx/id6755348218)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Semiannual | $19.99 | per 6 months |
| Premium Annual | $29.99 | per year |


## Frequently asked questions

### Is Fast free?

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

### Is Nature free?

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

### Do Fast or Nature have ads?

Neither Fast nor Nature shows ads.

### Which is updated more often, Fast or Nature?

Fast ships an update every 2 weeks, and Nature every 3 months. Most recently, Fast was updated on October 30, 2026 and Nature on October 30, 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.*