Primes + vs Samurai’s Dozen
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Primes +
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In mathematics the prime numbers (also called “primes”) are natural numbers greater than 1, divisible only by 1 and by themselves. "Primes" is a mathematical game of search of natural numbers that added together give as result prime numbers. For each level of the game, will be shown: - a TABLE of prime numbers formed by 30 prime numbers (that will change at every level of the game) - a MAP formed by 16 boxes containing natural numbers which, added together, will give as result at least 5 primes among those listed in the TABLE of prime numbers In the TABLE, primes will be highlighted: - in red if it exists in the MAP at least one combination (sum) of natural numbers that give as result the prime number highlighted in red (there is certainly a combination in the MAP) - in blue if it is not certain that there is in the MAP a combination (sum) of natural numbers that give as result the prime number highlighted in blue (may or may not exist a combination in the MAP) An automatic calculator (indicated by SUM) will assist You in the sum of natural numbers that You have selected in the MAP (combination). For each level, You will have 3 minutes of time to find 5 primes among those listed in the TABLE of prime numbers: so, you'll have to find 5 combinations of natural numbers in the MAP that will give as result 5 distinct prime numbers. This game increases the visual memory and the speed for mathematical calculation. It will also help You to store a large amount of prime numbers. Have fun with Primes...
Samurai’s Dozen
A memory card game where you compete against your iPhone to test your memorization skills. Flip cards, match pairs, and score points before your device outdoes you. It's an engaging way to challenge your mind and sharpen your memory on the go.
- Memory card gameplay
- Compete against iPhone
- Sharpen memory skills
- Fast-paced challenges
- Pocket-sized entertainment
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Dozen is a new kind of memory card game, one in which you play against the iPhone© to prove your memorizing abilities. Flip cards, memorize their locations, and score pairing points before the iPhone© beats you to it. Challenge your mind, sharpen your memory, and engage in fast-paced gameplay that is addictive, right from your pocket. Take Dozen with you wherever you go, pairing off cards as you race against your iPhone©. It’s a great way to travel, unwind after a long day, or simply take a break from the work or studying at hand.
Screenshots
Verdict
The clearest difference is price: Samurai’s Dozen at Free against Primes +'s $0.99. Samurai’s Dozen also leads on update cadence (every 5 months vs every 38 months) and iOS requirement (15.0 vs 18.0). On 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
Samurai’s Dozen is free to download; Primes + costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Primes + ships an update every 38 months, Samurai’s Dozen every 5 months. The most recent releases landed on October 9, 2026 and October 21, 2026 respectively.
| Parameter | Primes + | Samurai’s Dozen |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | — | 5.0 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 38 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 11 MB | 12 MB |
| Age rating | 4+ | 17+ |
| Developer | Gianluca Natalini | Igor Fedorov |
In-app purchases
Primes +
No in-app purchases
Samurai’s Dozen
No in-app purchases
