# sketchometry vs Graph³

The clearest difference is price: sketchometry at Free against Graph³'s $0.99. sketchometry also leads on in-app purchases (none vs 1). Graph³'s advantage is iOS requirement (9.0 vs 15.0). On update cadence, ads and device support there is nothing between them.

sketchometry is free to download; Graph³ costs $0.99 up front. Graph³ sells 1 one-off in-app purchase. sketchometry asks for nothing beyond the download.

sketchometry ships an update every 10 days, Graph³ every 3 weeks. The most recent releases landed on June 25, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | sketchometry | Graph³ |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/sketchometry/id635195332/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 65.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | **Free** | Paid |
| Size | 82 MB | 10 MB |
| Requires iOS | 15.0 | **9.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Universitaet Bayreuth](https://appshunter.io/developer/926230632) | [Norbert Grieger](https://appshunter.io/developer/1437060665) |

## What reviewers say

### sketchometry

[App page](https://appshunter.io/ios/app/sketchometry/id635195332)

This app transforms your finger drawings into precise geometric shapes on your iPhone or iPad. It turns math into an experimental subject, encouraging learners to discover concepts through hands-on interaction rather than presenting pre-made solutions.

**Highlights:** Finger-to-geometry conversion, Dynamic mathematical exploration, Experimental learning approach, Interactive geometric drawing, Supports iPhone and iPad

**Features:** macOS Compatibility

**In-app purchases:** none


### Graph³

[App page](https://appshunter.io/ios/app/graph/id1437807952)

Visualize mathematical functions in 2D and 3D with over 24 built-in functions. Automatically detect special points, customize settings for each function, and save your work. Ideal for students and math enthusiasts.

**Highlights:** 2D and 3D function display, Over 24 mathematical functions, Automatic detection of special points, Customizable function settings, Save and load scenes, Value table for function analysis

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3D Graph | $0.99 | one-time |


## Frequently asked questions

### Is sketchometry free?

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

### Is Graph³ free?

Graph³ costs $0.99, and also offers in-app purchases.

### Do sketchometry or Graph³ have ads?

Neither sketchometry nor Graph³ shows ads.

### Which is updated more often, sketchometry or Graph³?

sketchometry ships an update every 10 days, and Graph³ every 3 weeks. Most recently, sketchometry was updated on June 25, 2026 and Graph³ on September 3, 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.*