# Stickleback Evolution Lab vs EqCalc

The clearest difference is in-app purchases: Stickleback Evolution Lab at none against EqCalc's 1. Stickleback Evolution Lab also leads on iOS requirement (8.0 vs 18.2). EqCalc's advantage is update cadence (every 2 months vs every 28 months). On price, ads and device support there is nothing between them.

Both are free to download. EqCalc sells 1 one-off in-app purchase. Stickleback Evolution Lab asks for nothing beyond the download.

Stickleback Evolution Lab ships an update every 28 months, EqCalc every 2 months. The most recent releases landed on September 10, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Stickleback Evolution Lab | EqCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.6 (8 ratings)](https://appshunter.io/ios/app/stickleback-evolution-lab/id938339250/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 264 MB | 11 MB |
| Requires iOS | **8.0** | 18.2 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 17+ |
| Developer | [Howard Hughes Medical Institute](https://appshunter.io/developer/411540290) | [Jon Tonouchi](https://appshunter.io/developer/1814163396) |

## What reviewers say

### Stickleback Evolution Lab

[App page](https://appshunter.io/ios/app/stickleback-evolution-lab/id938339250)

Explore the science of evolution by analyzing the pelvic structures of threespine stickleback fish. This virtual lab offers three experiments using real fish specimens and fossils, complete with graphing and statistical analysis tools for drawing conclusions about population evolution.

**Highlights:** Analyze pelvic structures of threespine stickleback fish, Conduct experiments with living specimens and fossils, Collect and analyze biological data, Graphing and statistical analysis tools, Learn about evolutionary science

**Features:** macOS Compatibility

**In-app purchases:** none


### EqCalc

[App page](https://appshunter.io/ios/app/eqcalc-g/id6759407516)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Version | $2.99 | one-time |


## Frequently asked questions

### Is Stickleback Evolution Lab free?

Stickleback Evolution Lab is free to download, with no in-app purchases.

### Is EqCalc free?

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

### Do Stickleback Evolution Lab or EqCalc have ads?

Neither Stickleback Evolution Lab nor EqCalc shows ads.

### Which is updated more often, Stickleback Evolution Lab or EqCalc?

Stickleback Evolution Lab ships an update every 28 months, and EqCalc every 2 months. Most recently, Stickleback Evolution Lab was updated on September 10, 2026 and EqCalc on September 22, 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.*