# Build CLS vs Evo Training

The clearest difference is update cadence: Evo Training at every 8 days against Build CLS's every 19 months. Build CLS's advantage is iOS requirement (13.0 vs 15.6). 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.

Build CLS ships an update every 19 months, Evo Training every 8 days. The most recent releases landed on September 13, 2026 and September 1, 2026 respectively.

## The numbers

| Metric | Build CLS | Evo Training |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 8 days** |
| Size | 17 MB | 29 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Clinical Leadership Solutions LTD](https://appshunter.io/developer/1434082548) | [Evo Software Solutions](https://appshunter.io/developer/1493510876) |

## What reviewers say

### Build CLS

[App page](https://appshunter.io/ios/app/build-cls/id1439136458)

**In-app purchases:** none


### Evo Training

[App page](https://appshunter.io/ios/app/evo-training/id6468569493)

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

**In-app purchases:** none


## Frequently asked questions

### Is Build CLS free?

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

### Is Evo Training free?

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

### Do Build CLS or Evo Training have ads?

Neither Build CLS nor Evo Training shows ads.

### Which is updated more often, Build CLS or Evo Training?

Build CLS ships an update every 19 months, and Evo Training every 8 days. Most recently, Build CLS was updated on September 13, 2026 and Evo Training on September 1, 2026.

---

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