# CD4 Hunter vs Parasite Zapper

The clearest difference is ads: CD4 Hunter at none against Parasite Zapper's shown. CD4 Hunter also leads on update cadence (every 3 months vs every 27 months) and iOS requirement (7.0 vs 12.0). On price, 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.

CD4 Hunter ships an update every 3 months, Parasite Zapper every 27 months. The most recent releases landed on October 3, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | CD4 Hunter | Parasite Zapper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (17 ratings)](https://appshunter.io/ios/app/cd4-hunter/id1186846022/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 92.3% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 27 months |
| Monetization | Free | — |
| Size | 178 MB | 35 MB |
| Requires iOS | **7.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Drexel University](https://appshunter.io/developer/410950254) | [Jay Moores](https://appshunter.io/developer/1447456824) |

## What reviewers say

### CD4 Hunter

[App page](https://appshunter.io/ios/app/cd4-hunter/id1186846022)

Engage in a fast-paced educational game where you embody an HIV virion. Infect target cells, grow your viral population, and evade the immune system to learn about viral replication. Designed for higher education biomedical science curricula.

**Highlights:** Simulate HIV-1 virion behavior, Infect target cells in the bloodstream, Grow and control viral population, Evade immune system attacks, Learn HIV-1 replication cycle, Interactive gameplay for science education

**In-app purchases:** none


### Parasite Zapper

[App page](https://appshunter.io/ios/app/parasite-zapper/id1460168374)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CD4 Hunter free?

CD4 Hunter is free to download, with no in-app purchases.

### Is Parasite Zapper free?

Parasite Zapper is free to download, with no in-app purchases.

### Do CD4 Hunter or Parasite Zapper have ads?

Parasite Zapper shows ads; CD4 Hunter does not.

### Which is updated more often, CD4 Hunter or Parasite Zapper?

CD4 Hunter ships an update every 3 months, and Parasite Zapper every 27 months. Most recently, CD4 Hunter was updated on October 3, 2026 and Parasite Zapper on October 11, 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.*