# Sudoku Trainer! vs Voltix Storm

The clearest difference is in-app purchases: Voltix Storm at none against Sudoku Trainer!'s 3. Voltix Storm also leads on ads (none vs shown). Sudoku Trainer!'s advantage is device support (3 vs 1) and iOS requirement (15.1 vs 17). On price and update cadence there is nothing between them.

Both are free to download. Sudoku Trainer! sells 3 in-app purchases, starting at $0.99 per month. Voltix Storm asks for nothing beyond the download.

Sudoku Trainer! ships an update weekly, Voltix Storm every 9 days. The most recent releases landed on November 12, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Sudoku Trainer! | Voltix Storm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (6 ratings)](https://appshunter.io/ios/app/sudoku-trainer/id6749164735/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 9 days |
| Monetization | Free with in-app purchases | — |
| Size | 79 MB | 8 MB |
| Requires iOS | **15.1** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nicholas Nelson](https://appshunter.io/developer/1826651384) | [Dora Schoenholz](https://appshunter.io/developer/1880317982) |

## What reviewers say

### Sudoku Trainer!

[App page](https://appshunter.io/ios/app/sudoku-trainer/id6749164735)

This app offers a clean and efficient Sudoku puzzle experience with multiple difficulty levels and helpful tools like notes mode and candidate filling. Enjoy a smooth gameplay with features like auto-save, dark mode, and offline play.

**Highlights:** Multiple difficulty levels, Notes mode, Candidate filling button, Smart hints, Auto-save progress, Dark mode, Offline play

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sudoku Premium Monthly | $0.99 | per month |
| Sudoku Premium Annual | $4.99 | per year |
| Sudoku Premium Lifetime | $9.99 | one-time |


### Voltix Storm

[App page](https://appshunter.io/ios/app/voltix-storm/id6759711461)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sudoku Trainer! free?

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

### Is Voltix Storm free?

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

### Do Sudoku Trainer! or Voltix Storm have ads?

Sudoku Trainer! shows ads; Voltix Storm does not.

### Which is updated more often, Sudoku Trainer! or Voltix Storm?

Sudoku Trainer! ships an update weekly, and Voltix Storm every 9 days. Most recently, Sudoku Trainer! was updated on November 12, 2026 and Voltix Storm on November 9, 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.*