# ISF Functional Training vs COACHai

The clearest difference is update cadence: COACHai at monthly against ISF Functional Training's every 4 months. ISF Functional Training's advantage is iOS requirement (11.0 vs 15.0). 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.

ISF Functional Training ships an update every 4 months, COACHai monthly. The most recent releases landed on October 19, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | ISF Functional Training | COACHai |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Size | 105 MB | 38 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IMPACT STRENGTH AND FITNESS PTY LTD](https://appshunter.io/developer/1564695008) | [Coachai Pty Ltd](https://appshunter.io/developer/1671415294) |

## What reviewers say

### ISF Functional Training

[App page](https://appshunter.io/ios/app/isf-functional-training/id1645042137)

**Features:** macOS Compatibility

**In-app purchases:** none


### COACHai

[App page](https://appshunter.io/ios/app/coachai/id1671415292)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ISF Functional Training free?

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

### Is COACHai free?

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

### Do ISF Functional Training or COACHai have ads?

Neither ISF Functional Training nor COACHai shows ads.

### Which is updated more often, ISF Functional Training or COACHai?

ISF Functional Training ships an update every 4 months, and COACHai monthly. Most recently, ISF Functional Training was updated on October 19, 2026 and COACHai on October 27, 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.*