# Sudoku Tour vs e

The clearest difference is iOS requirement: Sudoku Tour at 10.0 against e's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Sudoku Tour sells 1 one-off in-app purchase and e sells 1 in-app purchase, starting at $24.99 per month. Whichever you choose, the download price is not the number that matters.

Sudoku Tour ships an update every 3 days, e every 5 days. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Sudoku Tour | e |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/sudoku-tour-brain-puzzles/id1481535112/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 5 days |
| Monetization | Free with in-app purchases | — |
| Size | 24 MB | 62 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ahaaa Education Technology Co., Ltd.](https://appshunter.io/developer/1470347128) | [Guenter Lukas](https://appshunter.io/developer/1538239495) |

## What reviewers say

### Sudoku Tour

[App page](https://appshunter.io/ios/app/sudoku-tour-brain-puzzles/id1481535112)

An engaging animal-themed puzzle game designed to introduce young children to the logic of Sudoku. It features adjustable difficulty levels and adorable animal characters to make learning fun and accessible for preschoolers.

**Highlights:** Adorable animal characters instead of numbers, Adjustable difficulty levels (3x3, 4x4, 6x6), Over 100 chapters with increasing complexity, Improves mental clarity and mathematical thinking, Boosts logical reasoning and concentration, Unique characters with special maps

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version of sudoku tour | $2.99 | one-time |


### e

[App page](https://appshunter.io/ios/app/e-ralph/id1538239493)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription Ralph | $24.99 | per month |


## Frequently asked questions

### Is Sudoku Tour free?

Sudoku Tour is free to download, with in-app purchases available.

### Is e free?

e is free to download, with in-app purchases available.

### Do Sudoku Tour or e have ads?

Neither Sudoku Tour nor e shows ads.

### Which is updated more often, Sudoku Tour or e?

Sudoku Tour ships an update every 3 days, and e every 5 days. Most recently, Sudoku Tour was updated on November 3, 2026 and e on November 7, 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.*