# Virus Killer vs One Stroke Brain Puzzle

The clearest difference is update cadence: Virus Killer at every 6 weeks against One Stroke Brain Puzzle's every 55 months. Virus Killer also leads on iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Virus Killer ships an update every 6 weeks, One Stroke Brain Puzzle every 55 months. The most recent releases landed on October 30, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Virus Killer | One Stroke Brain Puzzle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (6 ratings)](https://appshunter.io/ios/app/virus-killer/id623257684/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 6 weeks** | Every 55 months |
| Monetization | Ad-supported | — |
| Size | 13 MB | 139 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [毅 郑](https://appshunter.io/developer/514946161) | [ZIROTEK Corp.](https://appshunter.io/developer/1209821727) |

## What reviewers say

### Virus Killer

[App page](https://appshunter.io/ios/app/virus-killer/id623257684)

A puzzle game where players strategically drop colored capsules to eliminate viruses. Match four or more of the same color to clear them from the board and complete levels. Avoid filling the bottle to prevent a game over.

**Highlights:** Falling capsule manipulation, Color-matching mechanics, Virus elimination objectives, Level-based progression, Adjustable difficulty levels, Multiple game speed options

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

**In-app purchases:** none


### One Stroke Brain Puzzle

[App page](https://appshunter.io/ios/app/one-stroke-brain-puzzle/id1225019220)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Virus Killer free?

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

### Is One Stroke Brain Puzzle free?

One Stroke Brain Puzzle is free to download, with no in-app purchases.

### Do Virus Killer or One Stroke Brain Puzzle have ads?

Both Virus Killer and One Stroke Brain Puzzle show ads.

### Which is updated more often, Virus Killer or One Stroke Brain Puzzle?

Virus Killer ships an update every 6 weeks, and One Stroke Brain Puzzle every 55 months. Most recently, Virus Killer was updated on October 30, 2026 and One Stroke Brain Puzzle on October 26, 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.*