# Sudoku Classic vs Ruspectra

The clearest difference is in-app purchases: Ruspectra at none against Sudoku Classic's 7. Ruspectra also leads on ads (none vs shown) and update cadence (every 6 days vs every 3 weeks). On price and device support there is nothing between them.

Both are free to download. Sudoku Classic sells 7 one-off in-app purchases. Ruspectra asks for nothing beyond the download.

Sudoku Classic ships an update every 3 weeks, Ruspectra every 6 days. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Sudoku Classic | Ruspectra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sudoku-classic-number-math/id6744551672/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 90 MB | 45 MB |
| Requires iOS | 26.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Puzzle Mania Studio](https://appshunter.io/developer/1441008756) | [Hidenori Ishiii](https://appshunter.io/developer/1440959870) |

## What reviewers say

### Sudoku Classic

[App page](https://appshunter.io/ios/app/sudoku-classic-number-math/id6744551672)

Master the classic logic puzzle with endless challenges and brain-boosting benefits. Enjoy a beautiful design, intuitive controls, and customizable themes. Perfect for both beginners and experienced solvers seeking mental stimulation and relaxation.

**Highlights:** Endless puzzle challenges, Multiple difficulty levels, Daily challenges, Smart hints & mistake checker, Notes mode, Beautiful themes & customization, Offline play

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| 10 HINTS | $1.99 | one-time |
| 50 HINTS | $2.99 | one-time |
| 250 HINTS | $4.99 | one-time |
| 750 HINTS | $9.99 | one-time |
| 1850 HINTS | $19.99 | one-time |
| 4850 HINTS | $49.99 | one-time |


### Ruspectra

[App page](https://appshunter.io/ios/app/ruspectra/id6749314898)

**In-app purchases:** none


## Frequently asked questions

### Is Sudoku Classic free?

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

### Is Ruspectra free?

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

### Do Sudoku Classic or Ruspectra have ads?

Sudoku Classic shows ads; Ruspectra does not.

### Which is updated more often, Sudoku Classic or Ruspectra?

Sudoku Classic ships an update every 3 weeks, and Ruspectra every 6 days. Most recently, Sudoku Classic was updated on November 1, 2026 and Ruspectra on November 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.*