# C3 Training vs Sozo Gym

The clearest difference is update cadence: C3 Training at every 3 months against Sozo Gym's every 8 months. Sozo Gym's advantage is iOS requirement (12.4 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

C3 Training ships an update every 3 months, Sozo Gym every 8 months. The most recent releases landed on September 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | C3 Training | Sozo Gym |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 8 months |
| Size | 167 MB | 65 MB |
| Requires iOS | 16.0 | **12.4** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [C3 Training](https://appshunter.io/developer/1568949133) | [Xoda Pty Ltd](https://appshunter.io/developer/1662306656) |

## What reviewers say

### C3 Training

[App page](https://appshunter.io/ios/app/c3-training/id1568949131)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sozo Gym

[App page](https://appshunter.io/ios/app/sozo-gym/id6478176668)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is C3 Training free?

C3 Training is free to download, with no in-app purchases.

### Is Sozo Gym free?

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

### Do C3 Training or Sozo Gym have ads?

Neither C3 Training nor Sozo Gym shows ads.

### Which is updated more often, C3 Training or Sozo Gym?

C3 Training ships an update every 3 months, and Sozo Gym every 8 months. Most recently, C3 Training was updated on September 29, 2026 and Sozo Gym on October 25, 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.*