# Prism Lab vs Geoboard, by MLC

The clearest difference is in-app purchases: Geoboard, by MLC at none against Prism Lab's 1. Geoboard, by MLC also leads on rating (3.8 vs 3.3) and update cadence (every 39 months vs every 216 months). Prism Lab's advantage is ratings volume (287 vs 20). On price, review sentiment, ads and monetization model there is nothing between them.

Both are free to download. Prism Lab sells 1 one-off in-app purchase. Geoboard, by MLC asks for nothing beyond the download.

Geoboard, by MLC holds the better App Store score, 3.8 against 3.3. That said, the two scores are not equally well evidenced: Prism Lab has 287 ratings behind it against 20, so its average is the more settled of the two. Written reviews point the same way: 80% of Prism Lab's written reviews are positive against 81% of Geoboard, by MLC's.

Prism Lab ships an update every 216 months, Geoboard, by MLC every 39 months. The most recent releases landed on October 31, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Prism Lab | Geoboard, by MLC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (287 ratings)](https://appshunter.io/ios/app/prism-lab/id301875263/reviews) | **[3.8 (20 ratings)](https://appshunter.io/ios/app/geoboard-by-mlc/id1508606940/reviews)** |
| Number of ratings | **287** | 20 |
| Positive reviews | 80.0% of reviews | **81.3% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 216 months | **Every 39 months** |
| Monetization | Free | Free |
| Size | 2 MB | 5 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [KZ Labs](https://appshunter.io/developer/1091008972) | [The Math Learning Center](https://appshunter.io/developer/1542700905) |

## What reviewers say

### Prism Lab

[App page](https://appshunter.io/ios/app/prism-lab/id301875263)

This application simulates lasers passing through prisms, demonstrating light refraction and reflection using Snell's Law. Users can adjust light sources, materials, and prism shapes to observe how light's trajectory changes between environments. It's a practical tool for understanding optical principles.

**Highlights:** Laser refraction simulation, Snell's Law implementation, Adjustable light source, Variable prism shapes, Different material options, Angle calculation

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy me a coffee | $2.99 | one-time |


### Geoboard, by MLC

[App page](https://appshunter.io/ios/app/geoboard-by-mlc/id1508606940)

Explore mathematical concepts like perimeter, area, and fractions by stretching virtual bands around pegs to form shapes. This open-ended educational tool is ideal for elementary and middle school learners, offering multiple board types and drawing tools for interactive discovery.

**Highlights:** Create line segments and polygons, Multiple board types (square, rectangular, circular), Shape duplication and transformation, Fill shapes with transparent color, Display grid lines with numbering, Drawing and annotation tools, Save and share work

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Prism Lab free?

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

### Is Geoboard, by MLC free?

Geoboard, by MLC is free to download, with no in-app purchases.

### Which has better reviews, Prism Lab or Geoboard, by MLC?

Geoboard, by MLC is rated higher. Prism Lab averages 3.3 out of 5 from 287 ratings, while Geoboard, by MLC averages 3.8 from 20 ratings.

### Do Prism Lab or Geoboard, by MLC have ads?

Neither Prism Lab nor Geoboard, by MLC shows ads.

### Which is updated more often, Prism Lab or Geoboard, by MLC?

Prism Lab ships an update every 216 months, and Geoboard, by MLC every 39 months. Most recently, Prism Lab was updated on October 31, 2026 and Geoboard, by MLC on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*