# Color Train Trip vs Rettel

The clearest difference is iOS requirement: Color Train Trip at 13.0 against Rettel's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Color Train Trip ships an update every 8 days, Rettel weekly. The most recent releases landed on October 28, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Color Train Trip | Rettel |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rettel/id6761343326/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 8 days | **Weekly** |
| Monetization | — | Ad-supported |
| Size | 442 MB | 52 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Kaliba Games & Technologies Inc.](https://appshunter.io/developer/1549023239) | [Rettel LLC](https://appshunter.io/developer/1492599490) |

## What reviewers say

### Color Train Trip

[App page](https://appshunter.io/ios/app/color-train-trip/id6755210027)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rettel

[App page](https://appshunter.io/ios/app/rettel/id6761343326)

A free 2-player word game where each word played reverses letters on the board, creating strategic opportunities. Compete against friends or random opponents in timed matches, or test your skills against AI.

**Highlights:** Letter-reversing board mechanic, 2-player matches, Challenge friends or random opponents, AI bot with adjustable difficulty, Daily word and math puzzles, Profile tracking for stats

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

**In-app purchases:** none


## Frequently asked questions

### Is Color Train Trip free?

Color Train Trip is free to download, with no in-app purchases.

### Is Rettel free?

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

### Do Color Train Trip or Rettel have ads?

Both Color Train Trip and Rettel show ads.

### Which is updated more often, Color Train Trip or Rettel?

Color Train Trip ships an update every 8 days, and Rettel weekly. Most recently, Color Train Trip was updated on October 28, 2026 and Rettel on November 5, 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.*