# Pythagoras Interactive vs ProteinViewerApp

The clearest difference is price: Pythagoras Interactive at Free against ProteinViewerApp's $4.99. Pythagoras Interactive also leads on rating (5.0 vs 3.0). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Pythagoras Interactive is free to download; ProteinViewerApp costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Pythagoras Interactive holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Pythagoras Interactive ships an update every 2 weeks, ProteinViewerApp fortnightly. The most recent releases landed on September 30, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Pythagoras Interactive | ProteinViewerApp |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pythagoras-interactive/id6466731389/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/proteinviewerapp/id6752284307/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | **Free** | Paid |
| Size | 1 MB | 8 MB |
| Requires iOS | **16.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [ALAN PETERSON](https://appshunter.io/developer/1436516782) | [JONG HYUN LEE](https://appshunter.io/developer/1739037759) |

## What reviewers say

### Pythagoras Interactive

[App page](https://appshunter.io/ios/app/pythagoras-interactive/id6466731389)

Explore the Pythagorean Theorem with an interactive visual tool. Adjust triangle legs to observe real-time changes in square areas and hypotenuse length. Distances are displayed in radical form when necessary.

**Highlights:** Interactive triangle manipulation, Visual representation of squares on sides, Real-time updates to hypotenuse and areas, Radical form for distances, Clear labeling of sides and areas

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

**In-app purchases:** none


### ProteinViewerApp

[App page](https://appshunter.io/ios/app/proteinviewerapp/id6752284307)

Explore and learn about protein structures in 3D. This tool offers interactive visualization, educational modes, and direct access to protein data for students and researchers.

**Highlights:** 3D protein visualization, Step-by-step structural insights, Educational modes by category, Multiple rendering styles, Direct PDB integration, Clear terminology explanations

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pythagoras Interactive free?

Pythagoras Interactive is free to download, with no in-app purchases.

### Is ProteinViewerApp free?

ProteinViewerApp costs $4.99, with no in-app purchases.

### Which has better reviews, Pythagoras Interactive or ProteinViewerApp?

Pythagoras Interactive is rated higher. Pythagoras Interactive averages 5.0 out of 5 from 1 ratings, while ProteinViewerApp averages 3.0 from 2 ratings.

### Do Pythagoras Interactive or ProteinViewerApp have ads?

Neither Pythagoras Interactive nor ProteinViewerApp shows ads.

### Which is updated more often, Pythagoras Interactive or ProteinViewerApp?

Pythagoras Interactive ships an update every 2 weeks, and ProteinViewerApp fortnightly. Most recently, Pythagoras Interactive was updated on September 30, 2026 and ProteinViewerApp 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.*