# Primes + vs Samurai’s Dozen

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.

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.

## The numbers

| Metric | Primes + | Samurai’s Dozen |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/samurais-dozen/id6443761303/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 5 months** |
| Monetization | — | Free |
| Size | 11 MB | 12 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Gianluca Natalini](https://appshunter.io/developer/348380792) | [Igor Fedorov](https://appshunter.io/developer/1520158242) |

## What reviewers say

### Primes +

[App page](https://appshunter.io/ios/app/primes-plus/id859086296)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Samurai’s Dozen

[App page](https://appshunter.io/ios/app/samurais-dozen/id6443761303)

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.

**Highlights:** Memory card gameplay, Compete against iPhone, Sharpen memory skills, Fast-paced challenges, Pocket-sized entertainment

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Primes + free?

Primes + costs $0.99, with no in-app purchases.

### Is Samurai’s Dozen free?

Samurai’s Dozen is free to download, with no in-app purchases.

### Do Primes + or Samurai’s Dozen have ads?

Neither Primes + nor Samurai’s Dozen shows ads.

### Which is updated more often, Primes + or Samurai’s Dozen?

Primes + ships an update every 38 months, and Samurai’s Dozen every 5 months. Most recently, Primes + was updated on October 9, 2026 and Samurai’s Dozen on October 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*