# 進化論Evolution Fitness vs OnceKit

The clearest difference is in-app purchases: 進化論Evolution Fitness at none against OnceKit's 2. 進化論Evolution Fitness also leads on iOS requirement (13.0 vs 16.0). OnceKit's advantage is update cadence (every 3 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. OnceKit sells 2 in-app purchases, starting at $6.99 per month. 進化論Evolution Fitness asks for nothing beyond the download.

進化論Evolution Fitness ships an update every 2 months, OnceKit every 3 days. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 進化論Evolution Fitness | OnceKit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Size | 81 MB | 106 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [Po-Chuan Hsueh](https://appshunter.io/developer/1701937854) | [ZAADN INFORMATION CO., LTD.](https://appshunter.io/developer/6774871311) |

## What reviewers say

### 進化論Evolution Fitness

[App page](https://appshunter.io/ios/app/evolution-fitness/id1621430063)

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

**In-app purchases:** none


### OnceKit

[App page](https://appshunter.io/ios/app/oncekit/id6774871309)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OnceKit Pro Monthly | $6.99 | per month |
| OnceKit Pro Yearly | $59.99 | per year |


## Frequently asked questions

### Is 進化論Evolution Fitness free?

進化論Evolution Fitness is free to download, with no in-app purchases.

### Is OnceKit free?

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

### Do 進化論Evolution Fitness or OnceKit have ads?

Neither 進化論Evolution Fitness nor OnceKit shows ads.

### Which is updated more often, 進化論Evolution Fitness or OnceKit?

進化論Evolution Fitness ships an update every 2 months, and OnceKit every 3 days. Most recently, 進化論Evolution Fitness was updated on October 22, 2026 and OnceKit on October 24, 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.*