# Loop Train 3D vs Letter Grove

The clearest difference is in-app purchases: Letter Grove at none against Loop Train 3D's 10. Letter Grove also leads on ads (none vs shown). Loop Train 3D's advantage is iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Loop Train 3D sells 10 one-off in-app purchases. Letter Grove asks for nothing beyond the download.

## The numbers

| Metric | Loop Train 3D | Letter Grove |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (125 ratings)](https://appshunter.io/ios/app/loop-train-3d/id6746925538/reviews)** | — |
| Number of ratings | **125** | — |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 369 MB | 49 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bugbomb](https://appshunter.io/developer/1440148721) | [Tan Truong](https://appshunter.io/developer/1896087852) |

## What reviewers say

### Loop Train 3D

[App page](https://appshunter.io/ios/app/loop-train-3d/id6746925538)

Control a busy railway station by launching trains in the correct order. Plan your moves carefully to pick up passengers and avoid traffic jams. This logic puzzle game offers challenging levels and simple controls for a fun brain workout.

**Highlights:** Strategic train launch timing, Passenger pickup optimization, Challenging logic puzzles, Unique track layouts, Simple tap controls, Charming 3D graphics

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Pack | $0.99 | one-time |
| Coin Pack 1 | $1.99 | one-time |
| Revive Pack | $4.99 | one-time |
| Coin Pack 2 | $7.99 | one-time |
| No ads | $9.99 | one-time |
| No Ads Pack | $10.99 | one-time |
| Coin Pack 3 | $14.99 | one-time |
| Coin Pack 4 | $29.99 | one-time |
| Coin Pack 5 | $49.99 | one-time |
| Coin Pack 6 | $99.99 | one-time |


### Letter Grove

[App page](https://appshunter.io/ios/app/letter-grove-hidden-puzzle/id6829362477)

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

**In-app purchases:** none


## Frequently asked questions

### Is Loop Train 3D free?

Loop Train 3D is free to download, with in-app purchases available.

### Is Letter Grove free?

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

### Do Loop Train 3D or Letter Grove have ads?

Loop Train 3D shows ads; Letter Grove does not.

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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.*