# Primee! vs Arithzo

The clearest difference is price: Arithzo at Free against Primee!'s $1.99. Primee!'s advantage is iOS requirement (13.0 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Arithzo is free to download; Primee! costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Primee! ships an update every 2 months, Arithzo every 3 months. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Primee! | Arithzo |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/primee-a-brain-teaser-game/id6504009384/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 86.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Paid | — |
| Size | 115 MB | 15 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SOFT DEVICE INC.](https://appshunter.io/developer/1457647052) | [Yanli Wang](https://appshunter.io/developer/1890491726) |

## What reviewers say

### Primee!

[App page](https://appshunter.io/ios/app/primee-a-brain-teaser-game/id6504009384)

This is a fast-paced puzzle game where players tap prime numbers and swipe to factor composite numbers. It offers a mental workout with quick games and global leaderboards, designed for adults and teens seeking a satisfying challenge.

**Highlights:** Tap primes and factor composites, Mental workout for focus and logic, Quick 2-minute game sessions, Global leaderboards, Satisfying and addictive gameplay

**In-app purchases:** none


### Arithzo

[App page](https://appshunter.io/ios/app/arithzo/id6762428777)

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

**In-app purchases:** none


## Frequently asked questions

### Is Primee! free?

Primee! costs $1.99, with no in-app purchases.

### Is Arithzo free?

Arithzo is free to download, with no in-app purchases.

### Do Primee! or Arithzo have ads?

Neither Primee! nor Arithzo shows ads.

### Which is updated more often, Primee! or Arithzo?

Primee! ships an update every 2 months, and Arithzo every 3 months. Most recently, Primee! was updated on October 30, 2026 and Arithzo on October 28, 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.*