Pythagoras HD vs Cabri Express Primary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pythagoras HD
Explore the Pythagorean Theorem through interactive puzzles and visual proofs. This educational app offers a unique, formula-free approach to understanding geometry. It's designed to make learning engaging and accessible.
- Visual proofs of Pythagorean Theorem
- Interactive geometric puzzles
- Formula-free learning
- Engaging educational experience
- iPad compatibility
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A fascinating, beautiful and educating puzzle! Moreover, all this is a proof of the celebrated Pythagorean Theorem. Wait.. Several proofs! Now you can easily prove it without formulas!
Cabri Express Primary
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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 price: Cabri Express Primary at Free against Pythagoras HD's $0.99. Cabri Express Primary also leads on update cadence (every 2 months vs every 24 months) and device support (4 vs 1). Pythagoras HD's advantage is iOS requirement (12.0 vs 14.0). On ads and in-app purchases 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
Cabri Express Primary is free to download; Pythagoras HD costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Pythagoras HD ships an update every 24 months, Cabri Express Primary every 2 months. The most recent releases landed on October 11, 2026 and October 3, 2026 respectively.
| Parameter | Pythagoras HD | Cabri Express Primary |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 42.9% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 24 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPad | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 12.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 10 MB | 101 MB |
| Age rating | 4+ | 12+ |
| Developer | Roman Koksharov | Cabrilog SAS |
In-app purchases
Pythagoras HD
No in-app purchases
Cabri Express Primary
No in-app purchases
Questions
Is Pythagoras HD free?
Is Cabri Express Primary free?
Do Pythagoras HD or Cabri Express Primary have ads?
Which is updated more often, Pythagoras HD or Cabri Express Primary?
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