# Double Number Merging vs Shadow Ninja Sudoku

The clearest difference is ads: Shadow Ninja Sudoku at none against Double Number Merging's shown. Double Number Merging's advantage is update cadence (every 3 months vs every 10 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Double Number Merging sells 9 one-off in-app purchases and Shadow Ninja Sudoku sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Double Number Merging ships an update every 3 months, Shadow Ninja Sudoku every 10 months. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Double Number Merging | Shadow Ninja Sudoku |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (779 ratings)](https://appshunter.io/ios/app/double-number-merging/id6736434801/reviews)** | — |
| Number of ratings | **779** | — |
| Positive reviews | 7.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 10 months |
| Monetization | Free with in-app purchases | — |
| Size | 290 MB | 27 MB |
| Requires iOS | **15.0** | 15.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [puzzle studio](https://appshunter.io/developer/1562662220) | [Hesam Darvishiyan Haghighi](https://appshunter.io/developer/1784022594) |

## What reviewers say

### Double Number Merging

[App page](https://appshunter.io/ios/app/double-number-merging/id6736434801)

Engage your mind with a classic number-themed puzzle game. Strategically merge falling number blocks to clear space and achieve higher scores. Enjoy a fun and challenging experience anywhere, anytime, with features like daily bonuses and progress saving.

**Highlights:** Number block merging, Brain exercise, Multiple levels, Daily bonuses, Auto-save progress, Smash unwanted blocks

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1000 Diamonds | $0.99 | one-time |
| 10 Hammers | $1.49 | one-time |
| 10 Switches | $1.49 | one-time |
| 3000 Diamonds | $2.99 | one-time |
| 4400 Diamonds | $3.99 | one-time |
| Starter Pack | $4.99 | one-time |
| 9200 Diamonds | $7.99 | one-time |
| 18100 Diamonds | $14.99 | one-time |
| 26000 Diamonds | $19.99 | one-time |

**What reviewers like**

- 💡 Fun game concept

**What reviewers complain about**

- 🚫 Excessive ads that cover the screen
- 🐛 Ads that won't close or minimize
- 🚫 Ads that interrupt gameplay
- 🚫 Ads that prevent playing the game

**Reported bugs**

- Purchased items not received
- Freezing and crashing issues

**Requested features**

- Option to remove ads for a fee
- Reduce frequency of ads during gameplay


### Shadow Ninja Sudoku

[App page](https://appshunter.io/ios/app/shadow-ninja-sudoku/id6739170128)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $4.99 | one-time |


## Frequently asked questions

### Is Double Number Merging free?

Double Number Merging is free to download, with in-app purchases available.

### Is Shadow Ninja Sudoku free?

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

### Do Double Number Merging or Shadow Ninja Sudoku have ads?

Double Number Merging shows ads; Shadow Ninja Sudoku does not.

### Which is updated more often, Double Number Merging or Shadow Ninja Sudoku?

Double Number Merging ships an update every 3 months, and Shadow Ninja Sudoku every 10 months. Most recently, Double Number Merging was updated on October 30, 2026 and Shadow Ninja Sudoku on October 25, 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.*