sketchometry vs Cabri Express Primary
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.
Cabri Express Primary
Read full descriptionHide full description
Features of Cabri Express Primary include a super easy primary calculator, geometry instruments, 2D & 3D shapes plus a dynamic geometry environment. App wrapped in an intuitive app that kids love to use. The primary version distinguishes itself from the secondary version in the look and in the calculator: the division is arithmetic (per default) and decimal numbers, fractions, roots and trigonometric functions are not made extra visible. These adjustments are the results of reviews with math education experts and with ministries of education. With its friendly interface, Cabri Express allows students to visualize and manipulate abstract mathematical concepts. The app is a laboratory in which they explore, model, and investigate without any limits. Cabri is free, it is the reference software for dynamic mathematics. It has been used for more than 25 years by millions of teachers and students around the world. Good maths for students and power & ease for teachers, to teach math not the software.
Screenshots
Verdict
The clearest difference is update cadence: sketchometry at every 10 days against Cabri Express Primary's every 2 months. On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
sketchometry ships an update every 10 days, Cabri Express Primary every 2 months. The most recent releases landed on June 25, 2026 and September 9, 2026 respectively.
| Parameter | sketchometry | Cabri Express Primary |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (5 ratings) — better | — |
| Positive reviews | 65.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 10 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 82 MB | 101 MB |
| Age rating | 4+ | 12+ |
| Developer | Universitaet Bayreuth | Cabrilog SAS |
In-app purchases
sketchometry
No in-app purchases
Cabri Express Primary
No in-app purchases
Questions
Is sketchometry free?
Is Cabri Express Primary free?
Do sketchometry or Cabri Express Primary have ads?
Which is updated more often, sketchometry or Cabri Express Primary?
Other comparisons
