# Prime Number Puzzle vs HexThrees

The clearest difference is update cadence: HexThrees at every 5 months against Prime Number Puzzle's every 41 months. Prime Number Puzzle's advantage is iOS requirement (7.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Prime Number Puzzle ships an update every 41 months, HexThrees every 5 months. The most recent releases landed on October 18, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Prime Number Puzzle | HexThrees |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 41 months | **Every 5 months** |
| Monetization | — | Free |
| Size | 8 MB | 1 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RUCKYGAMES CO., LTD.](https://appshunter.io/developer/315948909) | [Ilja Stepanow](https://appshunter.io/developer/1532412634) |

## What reviewers say

### Prime Number Puzzle

[App page](https://appshunter.io/ios/app/prime-number-puzzle/id1080142824)

**In-app purchases:** none


### HexThrees

[App page](https://appshunter.io/ios/app/hexthrees/id1532412632)

A relaxing puzzle game where you swipe tiles to merge them based on Fibonacci and power-of-two rules. Expand your game field for endless play and enjoy satisfying haptic feedback on compatible devices.

**Highlights:** Swipe to move tiles, Merge tiles by Fibonacci and power-of-two rules, Expandable game field for endless play, Satisfying haptic feedback, Relaxing gameplay

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Prime Number Puzzle free?

Prime Number Puzzle is free to download, with no in-app purchases.

### Is HexThrees free?

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

### Do Prime Number Puzzle or HexThrees have ads?

Neither Prime Number Puzzle nor HexThrees shows ads.

### Which is updated more often, Prime Number Puzzle or HexThrees?

Prime Number Puzzle ships an update every 41 months, and HexThrees every 5 months. Most recently, Prime Number Puzzle was updated on October 18, 2026 and HexThrees on October 13, 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.*