# GreenTheory vs AB Trainer

The clearest difference is update cadence: AB Trainer at every 5 days against GreenTheory's every 3 weeks. 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.

GreenTheory ships an update every 3 weeks, AB Trainer every 5 days. The most recent releases landed on October 1, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | GreenTheory | AB Trainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Size | 75 MB | 109 MB |
| Requires iOS | 16.4 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Theory Holding SPA](https://appshunter.io/developer/1674784689) | [Lorenzo Fiorini](https://appshunter.io/developer/968476502) |

## What reviewers say

### GreenTheory

[App page](https://appshunter.io/ios/app/greentheory/id6445917575)

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

**In-app purchases:** none


### AB Trainer

[App page](https://appshunter.io/ios/app/ab-trainer/id6785916731)

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

**In-app purchases:** none


## Frequently asked questions

### Is GreenTheory free?

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

### Is AB Trainer free?

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

### Do GreenTheory or AB Trainer have ads?

Neither GreenTheory nor AB Trainer shows ads.

### Which is updated more often, GreenTheory or AB Trainer?

GreenTheory ships an update every 3 weeks, and AB Trainer every 5 days. Most recently, GreenTheory was updated on October 1, 2026 and AB Trainer on October 18, 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.*