# Ring Stack vs Sudoku Maestro

The clearest difference is in-app purchases: Sudoku Maestro at none against Ring Stack's 1. Sudoku Maestro also leads on update cadence (daily vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Ring Stack sells 1 one-off in-app purchase. Sudoku Maestro asks for nothing beyond the download.

Ring Stack ships an update every 5 weeks, Sudoku Maestro daily. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Ring Stack | Sudoku Maestro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (18 ratings)](https://appshunter.io/ios/app/ring-stack-color-sort/id1610379899/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 5 weeks | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 61 MB | 30 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sergei Shendrikov](https://appshunter.io/developer/1548534996) | [BRENDON JOHN HORE](https://appshunter.io/developer/1873085014) |

## What reviewers say

### Ring Stack

[App page](https://appshunter.io/ios/app/ring-stack-color-sort/id1610379899)

Engage in a classic and addictive puzzle experience. Arrange colorful hoops by sorting them onto the correct stacks. This game offers a simple yet challenging way to test your sorting skills.

**Highlights:** Classic addictive puzzle gameplay, Colorful hoop sorting, Simple and challenging mechanics, Intuitive interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### Sudoku Maestro

[App page](https://appshunter.io/ios/app/sudoku-maestro/id6760641414)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ring Stack free?

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

### Is Sudoku Maestro free?

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

### Do Ring Stack or Sudoku Maestro have ads?

Both Ring Stack and Sudoku Maestro show ads.

### Which is updated more often, Ring Stack or Sudoku Maestro?

Ring Stack ships an update every 5 weeks, and Sudoku Maestro daily. Most recently, Ring Stack was updated on November 3, 2026 and Sudoku Maestro on October 31, 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.*