# Triangles in Geometry vs GM ChessPrep

The clearest difference is price: GM ChessPrep at Free against Triangles in Geometry's $1.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

GM ChessPrep is free to download; Triangles in Geometry costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Triangles in Geometry ships an update every 27 months, GM ChessPrep every 42 months. The most recent releases landed on October 8, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Triangles in Geometry | GM ChessPrep |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/triangles-in-geometry/id1500084079/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 27 months** | Every 42 months |
| Monetization | Paid | — |
| Size | 6 MB | 3 MB |
| Requires iOS | **14.1** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Gomathy Shankaran](https://appshunter.io/developer/503956143) | [GMCHESSPREP LLC](https://appshunter.io/developer/1664061168) |

## What reviewers say

### Triangles in Geometry

[App page](https://appshunter.io/ios/app/triangles-in-geometry/id1500084079)

Learn the fundamentals of triangles, including types, centers, and area calculations. This app explains theorems and postulates with visual aids and includes review quizzes to test understanding.

**Highlights:** Triangle basics (Acute, Obtuse, Right Angle), Triangle centers (Centroid, Incenter, Orthocenter), Area calculations, Triangle theorems and postulates explained, Visual aids and images, Review quizzes

**Features:** Vision Pro support

**In-app purchases:** none


### GM ChessPrep

[App page](https://appshunter.io/ios/app/gm-chessprep/id1664061166)

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

**In-app purchases:** none


## Frequently asked questions

### Is Triangles in Geometry free?

Triangles in Geometry costs $1.99, with no in-app purchases.

### Is GM ChessPrep free?

GM ChessPrep is free to download, with no in-app purchases.

### Do Triangles in Geometry or GM ChessPrep have ads?

Neither Triangles in Geometry nor GM ChessPrep shows ads.

### Which is updated more often, Triangles in Geometry or GM ChessPrep?

Triangles in Geometry ships an update every 27 months, and GM ChessPrep every 42 months. Most recently, Triangles in Geometry was updated on October 8, 2026 and GM ChessPrep 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.*