sketchometry vs Graph³
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
sketchometry
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.
- Finger-to-geometry conversion
- Dynamic mathematical exploration
- Experimental learning approach
- Interactive geometric drawing
- Supports iPhone and iPad
Read full descriptionHide full description
Fascinatingly simple. Simply fascinating. sketchometry is a different kind of dynamic math software. You draw with your finger on your iPhone or iPad. sketchometry automatically converts these (finger) sketches into exact geometric objects. Mathematics becomes an experimental subject. No ready-made results are presented, learners are encouraged to go on a journey of discovery by themselves.
Graph³
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.
- 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
Read full descriptionHide full description
Graph is your powerful tool for visualizing mathematical functions—ideal for school, university, and anyone who wants to experience mathematics firsthand. 2D and 3D Display Seamlessly switch between classic 2D views and stunning 3D surface rendering. Graph functions with one or two variables and explore them interactively by zooming, panning, and rotating. Over 24 Mathematical Functions Trigonometric, hyperbolic, logarithmic, and other functions are at your disposal—including sin, cos, tan, ln, sqrt, and many more. Complex expressions with nested structures are reliably evaluated. Automatically Detect Special Points Zeros, y-intercepts, intersections, and points of tangency are automatically calculated and highlighted on the graph—so you can see the important properties of your functions at a glance. Individual Settings for Each Function Adjust the color, line thickness, resolution, and domain for each function individually. Graph multiple functions simultaneously and compare them directly. Save and Load Scenes Save all your work as a scene—including all functions, settings, colors, and camera positions. Reload saved scenes at any time and continue working seamlessly. Value Table View function values anywhere and analyze the behavior of your functions in detail. Thoughtful Design Color-coded input validation, an integrated mathematical keyboard, and a modern glass-effect design ensure a pleasant user experience. Highlights at a Glance: 2D and 3D Function Display Over 24 Mathematical Functions Automatic Detection of Special Points Customizable Color and Display Settings Save and Load Scenes Value Table Mathematical Keyboard
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | sketchometry | Graph³ |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.6 (5 ratings) — better | — |
| Positive reviews | 65.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 10 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 82 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Universitaet Bayreuth | Norbert Grieger |
In-app purchases
sketchometry
No in-app purchases
Graph³
- 3D Graph$0.99
Questions
Is sketchometry free?
Is Graph³ free?
Do sketchometry or Graph³ have ads?
Which is updated more often, sketchometry or Graph³?
Other comparisons
