# ZuDoKu vs Dr. Virus

The clearest difference is review sentiment: ZuDoKu at 100% against Dr. Virus's 19%. ZuDoKu also leads on rating (5.0 vs 2.6) and update cadence (every 9 days vs every 2 months). Dr. Virus's advantage is price (Free vs $0.99) and ratings volume (25 vs 4). On ads, in-app purchases and device support there is nothing between them.

Dr. Virus is free to download; ZuDoKu costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ZuDoKu holds the better App Store score, 5.0 against 2.6. That said, the two scores are not equally well evidenced: Dr. Virus has 25 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 100% of ZuDoKu's written reviews are positive against 19% of Dr. Virus's.

ZuDoKu ships an update every 9 days, Dr. Virus every 2 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | ZuDoKu | Dr. Virus |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/zudoku/id1468052850/reviews)** | [2.6 (25 ratings)](https://appshunter.io/ios/app/dr-virus-8-bit-version/id1502054840/reviews) |
| Number of ratings | 4 | **25** |
| Positive reviews | **100.0% of reviews** | 18.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Monetization | Paid | **Free** |
| Size | 33 MB | 47 MB |
| Requires iOS | 15.1 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dynetix Design Solutions Inc](https://appshunter.io/developer/903541920) | [Quang Duc Vu](https://appshunter.io/developer/1038090500) |

## What reviewers say

### ZuDoKu

[App page](https://appshunter.io/ios/app/zudoku/id1468052850)

Experience Sudoku in fresh ways with number, figure, or letter-based puzzles. Adjust difficulty, receive real-time conflict alerts, and track your progress with detailed game statistics. Choose timed or untimed modes for a personalized challenge.

**Highlights:** Classic number Sudoku, Figure-based Sudoku puzzles, Letter-based Sudoku puzzles, Adjustable game levels, Real-time conflict alerts, Timed or untimed modes, Game statistics and progress tracking

**In-app purchases:** none


### Dr. Virus

[App page](https://appshunter.io/ios/app/dr-virus-8-bit-version/id1502054840)

A classic falling block puzzle game where players strategically drop colored capsules to eliminate viruses. Progress through levels by clearing the screen and challenge yourself with different game modes.

**Highlights:** Falling block puzzle gameplay, 20 classic levels, Challenge mode with online leaderboard, Practice mode to select levels, Save and resume games, Offline and online high scores

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ZuDoKu free?

ZuDoKu costs $0.99, with no in-app purchases.

### Is Dr. Virus free?

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

### Which has better reviews, ZuDoKu or Dr. Virus?

ZuDoKu is rated higher. ZuDoKu averages 5.0 out of 5 from 4 ratings, while Dr. Virus averages 2.6 from 25 ratings.

### Do ZuDoKu or Dr. Virus have ads?

Neither ZuDoKu nor Dr. Virus shows ads.

### Which is updated more often, ZuDoKu or Dr. Virus?

ZuDoKu ships an update every 9 days, and Dr. Virus every 2 months. Most recently, ZuDoKu was updated on November 3, 2026 and Dr. Virus on November 3, 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.*