# Aether Train vs Sudoku.city

The clearest difference is ads: Aether Train at none against Sudoku.city's shown. Sudoku.city's advantage is update cadence (weekly vs every 2 months) and iOS requirement (13 vs 15.0). On price, 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.

Aether Train ships an update every 2 months, Sudoku.city weekly. The most recent releases landed on October 16, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Aether Train | Sudoku.city |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Size | 13 MB | 65 MB |
| Requires iOS | 15.0 | **13** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Louis THEOT](https://appshunter.io/developer/1863961412) | [Kim sung jun](https://appshunter.io/developer/1155903456) |

## What reviewers say

### Aether Train

[App page](https://appshunter.io/ios/app/aether-train/id6757463060)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sudoku.city

[App page](https://appshunter.io/ios/app/sudokucity-classic-puzzle/id6759892902)

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

**In-app purchases:** none


## Frequently asked questions

### Is Aether Train free?

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

### Is Sudoku.city free?

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

### Do Aether Train or Sudoku.city have ads?

Sudoku.city shows ads; Aether Train does not.

### Which is updated more often, Aether Train or Sudoku.city?

Aether Train ships an update every 2 months, and Sudoku.city weekly. Most recently, Aether Train was updated on October 16, 2026 and Sudoku.city on October 18, 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.*