# Butterfly Trainer vs gravitycoach

The clearest difference is in-app purchases: Butterfly Trainer at none against gravitycoach's 8. Butterfly Trainer also leads on update cadence (every 2 months vs every 6 months) and iOS requirement (12.0 vs 15.6). gravitycoach's advantage is device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. gravitycoach sells 8 one-off in-app purchases. Butterfly Trainer asks for nothing beyond the download.

Butterfly Trainer ships an update every 2 months, gravitycoach every 6 months. The most recent releases landed on September 27, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Butterfly Trainer | gravitycoach |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Size | 36 MB | 50 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Alexander Buder](https://appshunter.io/developer/886516415) | [Manuel Guarrera](https://appshunter.io/developer/1597998629) |

## What reviewers say

### Butterfly Trainer

[App page](https://appshunter.io/ios/app/butterfly-trainer/id1475441901)

**In-app purchases:** none


### gravitycoach

[App page](https://appshunter.io/ios/app/gravitycoach/id1597998627)

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| eBook I Mehr als nur Fitness! | Free | one-time |
| Kabelzug Workout – Teaser | Free | one-time |
| Kettlebell Power Workout | $34.99 | one-time |
| FLEX & FLEISCH - Krafttraining | $49.99 | one-time |
| Gravitas Finest Masterclass 2 | $49.99 | one-time |
| Power of Breath | $179.99 | one-time |
| Hohlkreuz besser verstehen 3.0 | $249.00 | one-time |
| Gravity Starter Coaching | $599.99 | one-time |


## Frequently asked questions

### Is Butterfly Trainer free?

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

### Is gravitycoach free?

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

### Do Butterfly Trainer or gravitycoach have ads?

Neither Butterfly Trainer nor gravitycoach shows ads.

### Which is updated more often, Butterfly Trainer or gravitycoach?

Butterfly Trainer ships an update every 2 months, and gravitycoach every 6 months. Most recently, Butterfly Trainer was updated on September 27, 2026 and gravitycoach on September 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.*