Prime Factors vs Memorize Prime Numbers
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Prime Factors
Explore numbers up to one trillion, with primes clearly marked. Tap any number to reveal its prime factors. Easily navigate to specific numbers using the search function and adjust the display with pinch-to-zoom gestures.
- View numbers up to 1 trillion
- Prime numbers highlighted
- Tap for prime factors
- Search for specific numbers
- Pinch and zoom display
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View all numbers from 1 to 1,000,000,000,000. Prime numbers shown with a red circle. Tap a number to see its Prime Factors. Jump directly to a number with the search field. • Prime Numbers are marked with a red circle • Prime Factors can be viewed by tapping on a number • Pinch and Zoom to change the number of columns
Memorize Prime Numbers
Learn to memorize hundreds of prime numbers within a week using a provided method. This app offers a unique approach to remembering these special numbers.
- Memorize hundreds of prime numbers
- Learn a provided memorization method
- Focus on prime number recall
- Suitable for quick learning
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Memory Pi digit is a competition. There are another type of number also good as memorize. Which is Prime Numbers. Prime Numbers is very special. But no easy to memory. Using our provided method, you are easy to remember hundreds of Prime number with a week. Try you will know.
Screenshots
Verdict
The clearest difference is rating: Prime Factors at 3.9 against Memorize Prime Numbers's 3.0. Prime Factors also leads on ads (none vs shown) and review sentiment (79% vs 50%). Memorize Prime Numbers's advantage is update cadence (every 10 months vs every 21 months) and iOS requirement (15.6 vs 18.0). On 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
Prime Factors costs $0.99 and Memorize Prime Numbers $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Prime Factors holds the better App Store score, 3.9 against 3.0. That said, the two scores are not equally well evidenced: Prime Factors has 24 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 79% of Prime Factors's written reviews are positive against 50% of Memorize Prime Numbers's.
Prime Factors ships an update every 21 months, Memorize Prime Numbers every 10 months. The most recent releases landed on September 10, 2026 and September 19, 2026 respectively.
| Parameter | Prime Factors | Memorize Prime Numbers |
|---|---|---|
| Price | $0.99 — better | $4.99 |
| Rating | 3.9 (24 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 78.6% of reviews — better | 50.0% of reviews |
| Number of ratings | 24 — better | 2 |
| Update frequency | Every 21 months | Every 10 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 1 MB | 53 MB |
| Age rating | 4+ | 4+ |
| Developer | Paul Hangas | Oscar Tsang |
Customer experience
Prime Factors
Memorize Prime Numbers
In-app purchases
Prime Factors
No in-app purchases
Memorize Prime Numbers
No in-app purchases
Questions
Is Prime Factors free?
Is Memorize Prime Numbers free?
Which has better reviews, Prime Factors or Memorize Prime Numbers?
Do Prime Factors or Memorize Prime Numbers have ads?
Which is updated more often, Prime Factors or Memorize Prime Numbers?
Other comparisons
