Rectangles & Primes vs Positional Encoding
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.
Positional Encoding
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This is an educational App for readers interested in the sin/cos encoding of the token positions in large language models (LLM). Play with this App to acquire a deeper understanding of the positional encoder as it was described in the famous *Attention is All You Need* paper. In particular the App shows how the correlation between two positional vectors depends only on the distance between the corresponding two integer position.
Screenshots
Verdict
The clearest difference is iOS requirement: Rectangles & Primes at 15.0 against Positional Encoding's 18.5. On price, update cadence, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Rectangles & Primes ships an update every 3 weeks, Positional Encoding monthly. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.
| Parameter | Rectangles & Primes | Positional Encoding |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.0 — better | 18.5 |
| Further details — not scored | ||
| Size | 10 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Johannes Charra | carl nohre |
In-app purchases
Rectangles & Primes
No in-app purchases
Positional Encoding
No in-app purchases
Questions
Is Rectangles & Primes free?
Is Positional Encoding free?
Do Rectangles & Primes or Positional Encoding have ads?
Which is updated more often, Rectangles & Primes or Positional Encoding?
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