# Zombie Sudoku vs Voice Shadow

The clearest difference is in-app purchases: Zombie Sudoku at none against Voice Shadow's 3. Voice Shadow's advantage is update cadence (every 2 weeks vs every 5 months) and iOS requirement (13.0 vs 16.6). On price, ads and device support there is nothing between them.

Both are free to download. Voice Shadow sells 3 in-app purchases, starting at $3.99 per month. Zombie Sudoku asks for nothing beyond the download.

Zombie Sudoku ships an update every 5 months, Voice Shadow every 2 weeks. The most recent releases landed on October 21, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Zombie Sudoku | Voice Shadow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/zombie-sudoku/id6447004558/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 14 MB | 98 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Jason Baxter](https://appshunter.io/developer/1539854551) | [召 陈](https://appshunter.io/developer/1856941752) |

## What reviewers say

### Zombie Sudoku

[App page](https://appshunter.io/ios/app/zombie-sudoku/id6447004558)

A unique twist on the classic Sudoku puzzle, this game replaces numbers with zombies. It challenges players to use visual thinking and logic to solve puzzles, offering multiple difficulty levels and hints.

**Highlights:** Zombie-themed Sudoku puzzles, Visual thinking challenges, Multiple difficulty levels, Hint system available, Timed gameplay, Single-player competition

**Features:** macOS Compatibility

**In-app purchases:** none


### Voice Shadow

[App page](https://appshunter.io/ios/app/voice-shadow-vocal-visualizer/id6756025762)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Monthly | $3.99 | per month |
| PRO Yearly | $29.99 | per year |
| Lifetime Access | $49.99 | one-time |


## Frequently asked questions

### Is Zombie Sudoku free?

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

### Is Voice Shadow free?

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

### Do Zombie Sudoku or Voice Shadow have ads?

Neither Zombie Sudoku nor Voice Shadow shows ads.

### Which is updated more often, Zombie Sudoku or Voice Shadow?

Zombie Sudoku ships an update every 5 months, and Voice Shadow every 2 weeks. Most recently, Zombie Sudoku was updated on October 21, 2026 and Voice Shadow on October 2, 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.*