# Stellar Math vs St.Gall Algorithm

The clearest difference is in-app purchases: St.Gall Algorithm at none against Stellar Math's 2. St.Gall Algorithm also leads on update cadence (every 3 weeks vs every 8 months) and iOS requirement (13.0 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. Stellar Math sells 2 in-app purchases, starting at $9.99 per month. St.Gall Algorithm asks for nothing beyond the download.

Stellar Math ships an update every 8 months, St.Gall Algorithm every 3 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Stellar Math | St.Gall Algorithm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stellar-math/id6753595457/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 weeks** |
| Monetization | Freemium | — |
| Size | 113 MB | 26 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Matthew Leonard](https://appshunter.io/developer/522479113) | [HOCH Health Ostschweiz](https://appshunter.io/developer/1378566484) |

## What reviewers say

### Stellar Math

[App page](https://appshunter.io/ios/app/stellar-math/id6753595457)

Master math with an AI tutor that adapts to your learning style and pace. Get instant, step-by-step solutions to problems by snapping a photo and engage with a 24/7 AI chat for clear explanations. Track your progress and build confidence from basic arithmetic to advanced calculus.

**Highlights:** AI-powered step-by-step solutions, Photo problem solver, Interactive AI tutor chat, Personalized study plans, Progress tracking and analytics, Comprehensive math topic coverage

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stellar Math Pro | $9.99 | per month |
| Stellar Math Pro Yearly | $69.99 | per year |


### St.Gall Algorithm

[App page](https://appshunter.io/ios/app/stgall-algorithm/id6766456299)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Stellar Math free?

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

### Is St.Gall Algorithm free?

St.Gall Algorithm is free to download, with no in-app purchases.

### Do Stellar Math or St.Gall Algorithm have ads?

Neither Stellar Math nor St.Gall Algorithm shows ads.

### Which is updated more often, Stellar Math or St.Gall Algorithm?

Stellar Math ships an update every 8 months, and St.Gall Algorithm every 3 weeks. Most recently, Stellar Math was updated on November 5, 2026 and St.Gall Algorithm on October 31, 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.*