# Pythagoras HD vs Probability Toolkit

The clearest difference is update cadence: Probability Toolkit at every 10 months against Pythagoras HD's every 24 months. Pythagoras HD's advantage is price ($0.99 vs $1.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Pythagoras HD costs $0.99 and Probability Toolkit $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Pythagoras HD ships an update every 24 months, Probability Toolkit every 10 months. The most recent releases landed on September 25, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Pythagoras HD | Probability Toolkit |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/pythagoras-hd/id404432708/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 42.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 10 months** |
| Monetization | Paid | — |
| Size | 10 MB | 41 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Roman Koksharov](https://appshunter.io/developer/700716922) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## What reviewers say

### Pythagoras HD

[App page](https://appshunter.io/ios/app/pythagoras-hd/id404432708)

Explore the Pythagorean Theorem through interactive puzzles and visual proofs. This educational app offers a unique, formula-free approach to understanding geometry. It's designed to make learning engaging and accessible.

**Highlights:** Visual proofs of Pythagorean Theorem, Interactive geometric puzzles, Formula-free learning, Engaging educational experience, iPad compatibility

**Features:** macOS Compatibility

**In-app purchases:** none


### Probability Toolkit

[App page](https://appshunter.io/ios/app/probability-toolkit/id652216774)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pythagoras HD free?

Pythagoras HD costs $0.99, with no in-app purchases.

### Is Probability Toolkit free?

Probability Toolkit costs $1.99, with no in-app purchases.

### Do Pythagoras HD or Probability Toolkit have ads?

Neither Pythagoras HD nor Probability Toolkit shows ads.

### Which is updated more often, Pythagoras HD or Probability Toolkit?

Pythagoras HD ships an update every 24 months, and Probability Toolkit every 10 months. Most recently, Pythagoras HD was updated on September 25, 2026 and Probability Toolkit on October 2, 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.*