# Solving Pythagoras PRO vs Substage

The clearest difference is price: Substage at Free against Solving Pythagoras PRO's $1.99. Solving Pythagoras PRO's advantage is in-app purchases (none vs 3) and update cadence (every 5 weeks vs every 3 months). On ads and device support there is nothing between them.

Substage is free to download; Solving Pythagoras PRO costs $1.99 up front. Substage sells 3 in-app purchases, starting at $12.99 per month. Solving Pythagoras PRO asks for nothing beyond the download.

Solving Pythagoras PRO ships an update every 5 weeks, Substage every 3 months. The most recent releases landed on October 4, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Solving Pythagoras PRO | Substage |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.2 (35 ratings)](https://appshunter.io/ios/app/solving-pythagoras-pro/id1273601215/reviews)** | — |
| Number of ratings | **35** | — |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | Free | — |
| Size | 179 MB | 227 MB |
| Requires iOS | **15.0** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) | [Loopius Software UG (haftungsbeschraenkt)](https://appshunter.io/developer/345012367) |

## What reviewers say

### Solving Pythagoras PRO

[App page](https://appshunter.io/ios/app/solving-pythagoras-pro/id1273601215)

Easily calculate the sides of a right-angled triangle using the Pythagorean theorem. Input two sides to find the third, with all calculations saved in a history. Supports fractions and provides clear solution steps.

**Highlights:** Pythagorean theorem calculations, Calculate any of the three sides, Fraction input support, Calculation history, Clear solution steps, Manual history sorting and deletion

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

**In-app purchases:** none


### Substage

[App page](https://appshunter.io/ios/app/substage/id6758638305)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SubStage Pro - monthly | $12.99 | per month |
| SubStage | $34.99 | per 3 months |
| SubStage Pro - jährlich | $89.99 | per year |


## Frequently asked questions

### Is Solving Pythagoras PRO free?

Solving Pythagoras PRO costs $1.99, with no in-app purchases.

### Is Substage free?

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

### Do Solving Pythagoras PRO or Substage have ads?

Neither Solving Pythagoras PRO nor Substage shows ads.

### Which is updated more often, Solving Pythagoras PRO or Substage?

Solving Pythagoras PRO ships an update every 5 weeks, and Substage every 3 months. Most recently, Solving Pythagoras PRO was updated on October 4, 2026 and Substage on October 5, 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.*