# JustTrain Training Hub vs CastleBird

The clearest difference is in-app purchases: CastleBird at none against JustTrain Training Hub's 4. JustTrain Training Hub's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. JustTrain Training Hub sells 4 one-off in-app purchases. CastleBird asks for nothing beyond the download.

JustTrain Training Hub ships an update every 3 weeks, CastleBird every 3 months. The most recent releases landed on October 19, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | JustTrain Training Hub | CastleBird |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Size | 32 MB | 93 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [HareDev LTD](https://appshunter.io/developer/623584742) | [CastleBird](https://appshunter.io/developer/1689612442) |

## What reviewers say

### JustTrain Training Hub

[App page](https://appshunter.io/ios/app/justtrain-training-hub/id1337606275)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Service Sales (Level 2) | $2.99 | one-time |
| Service Sales (Level 3) | $8.99 | one-time |
| Service Sales (Level 6) | $54.99 | one-time |
| Service Sales (Level 7) | $74.99 | one-time |


### CastleBird

[App page](https://appshunter.io/ios/app/castlebird/id6449547159)

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

**In-app purchases:** none


## Frequently asked questions

### Is JustTrain Training Hub free?

JustTrain Training Hub is free to download, with in-app purchases available.

### Is CastleBird free?

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

### Do JustTrain Training Hub or CastleBird have ads?

Neither JustTrain Training Hub nor CastleBird shows ads.

### Which is updated more often, JustTrain Training Hub or CastleBird?

JustTrain Training Hub ships an update every 3 weeks, and CastleBird every 3 months. Most recently, JustTrain Training Hub was updated on October 19, 2026 and CastleBird on October 25, 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.*