# CD4 Hunter vs Carrying Capacity Ecosystems

The clearest difference is update cadence: CD4 Hunter at every 3 months against Carrying Capacity Ecosystems's every 63 months. CD4 Hunter also leads on iOS requirement (7.0 vs 11.0). 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.

CD4 Hunter ships an update every 3 months, Carrying Capacity Ecosystems every 63 months. The most recent releases landed on November 2, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | CD4 Hunter | Carrying Capacity Ecosystems |
| --- | --- | --- |
| 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 | No |
| Update frequency | **Every 3 months** | Every 63 months |
| Monetization | Free | — |
| Size | 178 MB | 20 MB |
| Requires iOS | **7.0** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Drexel University](https://appshunter.io/developer/410950254) | [Science Education Institute](https://appshunter.io/developer/1439710468) |

## 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


### Carrying Capacity Ecosystems

[App page](https://appshunter.io/ios/app/carrying-capacity-ecosystems/id1439730533)

**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 Carrying Capacity Ecosystems free?

Carrying Capacity Ecosystems is free to download, with no in-app purchases.

### Do CD4 Hunter or Carrying Capacity Ecosystems have ads?

Neither CD4 Hunter nor Carrying Capacity Ecosystems shows ads.

### Which is updated more often, CD4 Hunter or Carrying Capacity Ecosystems?

CD4 Hunter ships an update every 3 months, and Carrying Capacity Ecosystems every 63 months. Most recently, CD4 Hunter was updated on November 2, 2026 and Carrying Capacity Ecosystems on November 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.*