# Constellations Puzzle vs Prime Factorization

The clearest difference is rating: Constellations Puzzle at 4.8 against Prime Factorization's 2.5. Constellations Puzzle also leads on review sentiment (84% vs 67%) and ratings volume (21 vs 4). Prime Factorization's advantage is ads (none vs shown) and update cadence (every 6 weeks vs every 5 months). On price, 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.

Constellations Puzzle holds the better App Store score, 4.8 against 2.5. That said, the two scores are not equally well evidenced: Constellations Puzzle has 21 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 84% of Constellations Puzzle's written reviews are positive against 67% of Prime Factorization's.

Constellations Puzzle ships an update every 5 months, Prime Factorization every 6 weeks. The most recent releases landed on October 23, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Constellations Puzzle | Prime Factorization |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (21 ratings)](https://appshunter.io/ios/app/constellations-puzzle/id585551131/reviews)** | [2.5 (4 ratings)](https://appshunter.io/ios/app/prime-factorization-free-brain-training-game/id1062168263/reviews) |
| Number of ratings | **21** | 4 |
| Positive reviews | **84.4% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 6 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 14 MB | 22 MB |
| Requires iOS | 13.0 | **7.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Plus Inc. (Japan)](https://appshunter.io/developer/445792061) | [NAKAYUBI CORPORATION](https://appshunter.io/developer/826300169) |

## What reviewers say

### Constellations Puzzle

[App page](https://appshunter.io/ios/app/constellations-puzzle/id585551131)

Learn constellations through a fun jigsaw puzzle experience. Choose from three modes featuring different sets of constellations. Compete for the best time, collect picture panels, and use assistance features to help you learn.

**Highlights:** Learn constellations via jigsaw puzzles, Three distinct constellation modes, Timed challenges for best scores, Collectible picture panels, Assisted navigation feature, Global player leaderboards

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

**In-app purchases:** none


### Prime Factorization

[App page](https://appshunter.io/ios/app/prime-factorization-free-brain-training-game/id1062168263)

This game challenges you to break down numbers into their prime factors until you reach one. It offers a simple yet engaging way to exercise your brain through number manipulation.

**Highlights:** Number factorization gameplay, Objective: reduce number to 1, Brain training exercises, Simple mechanics

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Constellations Puzzle free?

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

### Is Prime Factorization free?

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

### Which has better reviews, Constellations Puzzle or Prime Factorization?

Constellations Puzzle is rated higher. Constellations Puzzle averages 4.8 out of 5 from 21 ratings, while Prime Factorization averages 2.5 from 4 ratings.

### Do Constellations Puzzle or Prime Factorization have ads?

Constellations Puzzle shows ads; Prime Factorization does not.

### Which is updated more often, Constellations Puzzle or Prime Factorization?

Constellations Puzzle ships an update every 5 months, and Prime Factorization every 6 weeks. Most recently, Constellations Puzzle was updated on October 23, 2026 and Prime Factorization on October 14, 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.*