Rectangles & Primes vs Facterz
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rectangles & Primes
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Rectangle provides a fun and insightful maths experience for kids aged 6 to 12. They will improve their understanding of number factorization and prime numbers.
Facterz
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Calculate the Least Common Multiple (LCM) and Greatest Common Factor (GCF) of two integers. To top it off, you will also be able to see several different calculation methodologies including prime factorization, the Euclidean algorithm, and the Extended Euclidean algorithm.
Screenshots
Verdict
Rectangles & Primes and Facterz are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
| Parameter | Rectangles & Primes | Facterz |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | — |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 10 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Johannes Charra | Stuart Zussman |
In-app purchases
Rectangles & Primes
No in-app purchases
Facterz
No in-app purchases
Questions
Is Rectangles & Primes free?
Is Facterz free?
Do Rectangles & Primes or Facterz have ads?
Other comparisons
