# Stickleback Evolution Lab vs OLSAT for 6th Grade

The clearest difference is review sentiment: Stickleback Evolution Lab at 100% against OLSAT for 6th Grade's 0%. Stickleback Evolution Lab also leads on price (Free vs $2.99) and iOS requirement (8.0 vs 12.0). OLSAT for 6th Grade's advantage is update cadence (every 2 months vs every 28 months) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.

Stickleback Evolution Lab is free to download; OLSAT for 6th Grade costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Stickleback Evolution Lab ships an update every 28 months, OLSAT for 6th Grade every 2 months. The most recent releases landed on September 10, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Stickleback Evolution Lab | OLSAT for 6th Grade |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| 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** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 2 months** |
| Monetization | **Free** | Paid |
| Size | 264 MB | 31 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Howard Hughes Medical Institute](https://appshunter.io/developer/411540290) | [Polemics Applications LLC](https://appshunter.io/developer/482504032) |

## 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


### OLSAT for 6th Grade

[App page](https://appshunter.io/ios/app/olsat-for-6th-grade/id1209892041)

Prepare for gifted and talented testing with this comprehensive training app. It covers all essential OLSAT areas with adaptive quizzes, detailed feedback, and explanations. Develop critical thinking and problem-solving skills for assessments.

**Highlights:** Covers all 15 essential OLSAT areas, Adaptive quizzes with immediate scoring, Detailed answer explanations, Comprehensive review modes, Training section with practical tips, Full-color graphics

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Stickleback Evolution Lab free?

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

### Is OLSAT for 6th Grade free?

OLSAT for 6th Grade costs $2.99, with no in-app purchases.

### Do Stickleback Evolution Lab or OLSAT for 6th Grade have ads?

Neither Stickleback Evolution Lab nor OLSAT for 6th Grade shows ads.

### Which is updated more often, Stickleback Evolution Lab or OLSAT for 6th Grade?

Stickleback Evolution Lab ships an update every 28 months, and OLSAT for 6th Grade every 2 months. Most recently, Stickleback Evolution Lab was updated on September 10, 2026 and OLSAT for 6th Grade on June 1, 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.*