# Choo vs NULLORBIT

The clearest difference is price: NULLORBIT at Free against Choo's $4.99. Choo's advantage is update cadence (every 3 weeks vs every 2 months) and chart position (#138 vs unranked). On ads, in-app purchases and device support there is nothing between them.

NULLORBIT is free to download; Choo costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Choo ships an update every 3 weeks, NULLORBIT every 2 months. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Choo | NULLORBIT |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.9 (33 ratings)](https://appshunter.io/ios/app/choo-choo-charles/id6761855524/reviews)** | — |
| Number of ratings | **33** | — |
| Positive reviews | 95.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Paid | — |
| Best chart rank | **#138** | — |
| Size | 1.7 GB | 24 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Gavin Eisenbeisz](https://appshunter.io/developer/1891797692) | [Terrence Sheflin](https://appshunter.io/developer/6775281872) |

## What reviewers say

### Choo

[App page](https://appshunter.io/ios/app/choo-choo-charles/id6761855524)

**Currently charting:** #138 Top Paid · Action, #139 Top Paid · Adventure (US App Store)

Embark on a thrilling adventure to defeat a monstrous train. Upgrade your own engine with powerful weapons and items obtained from townspeople to prepare for a final, epic battle.

**Highlights:** Navigate treacherous tracks, Upgrade your train, Acquire powerful weapons, Complete missions, Fight a monstrous train, Explore a massive play area

**In-app purchases:** none


### NULLORBIT

[App page](https://appshunter.io/ios/app/nullorbit/id6775281869)

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

**In-app purchases:** none


## Frequently asked questions

### Is Choo free?

Choo costs $4.99, with no in-app purchases.

### Is NULLORBIT free?

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

### Do Choo or NULLORBIT have ads?

Neither Choo nor NULLORBIT shows ads.

### Which is updated more often, Choo or NULLORBIT?

Choo ships an update every 3 weeks, and NULLORBIT every 2 months. Most recently, Choo was updated on October 14, 2026 and NULLORBIT on October 8, 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.*