# The Castle Training Studio vs RRB Studios

The clearest difference is update cadence: RRB Studios at fortnightly against The Castle Training Studio's every 5 months. 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.

The Castle Training Studio ships an update every 5 months, RRB Studios fortnightly. The most recent releases landed on September 29, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | The Castle Training Studio | RRB Studios |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Fortnightly** |
| Size | 121 MB | 3 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Sutra Fitness, Inc.](https://appshunter.io/developer/914371834) | [RRB Dance Company, LLC](https://appshunter.io/developer/1271902590) |

## What reviewers say

### The Castle Training Studio

[App page](https://appshunter.io/ios/app/the-castle-training-studio/id6760562923)

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

**In-app purchases:** none


### RRB Studios

[App page](https://appshunter.io/ios/app/rrb-studios/id6773409911)

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

**In-app purchases:** none


## Frequently asked questions

### Is The Castle Training Studio free?

The Castle Training Studio is free to download, with no in-app purchases.

### Is RRB Studios free?

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

### Do The Castle Training Studio or RRB Studios have ads?

Neither The Castle Training Studio nor RRB Studios shows ads.

### Which is updated more often, The Castle Training Studio or RRB Studios?

The Castle Training Studio ships an update every 5 months, and RRB Studios fortnightly. Most recently, The Castle Training Studio was updated on September 29, 2026 and RRB Studios on October 10, 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.*