# Constellations Puzzle vs Constant Challenge

The clearest difference is in-app purchases: Constellations Puzzle at none against Constant Challenge's 3. Constellations Puzzle also leads on iOS requirement (13.0 vs 26.0). Constant Challenge's advantage is ads (none vs shown) and update cadence (every 2 days vs every 5 months). On price and device support there is nothing between them.

Both are free to download. Constant Challenge sells 3 one-off in-app purchases. Constellations Puzzle asks for nothing beyond the download.

Constellations Puzzle ships an update every 5 months, Constant Challenge every 2 days. The most recent releases landed on October 10, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Constellations Puzzle | Constant Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (21 ratings)](https://appshunter.io/ios/app/constellations-puzzle/id585551131/reviews)** | — |
| Number of ratings | **21** | — |
| Positive reviews | 84.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 2 days** |
| Monetization | Ad-supported | — |
| Size | 14 MB | 16 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Plus Inc. (Japan)](https://appshunter.io/developer/445792061) | [Kaname Inoue](https://appshunter.io/developer/1888387338) |

## 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


### Constant Challenge

[App page](https://appshunter.io/ios/app/constant-challenge/id6761248442)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock the Square Root of 2 (√2) | $0.99 | one-time |
| Unlock the Golden Ratio (φ) | $0.99 | one-time |
| Unlock the Euler–Mascheroni (γ) | $0.99 | one-time |


## Frequently asked questions

### Is Constellations Puzzle free?

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

### Is Constant Challenge free?

Constant Challenge is free to download, with in-app purchases available.

### Do Constellations Puzzle or Constant Challenge have ads?

Constellations Puzzle shows ads; Constant Challenge does not.

### Which is updated more often, Constellations Puzzle or Constant Challenge?

Constellations Puzzle ships an update every 5 months, and Constant Challenge every 2 days. Most recently, Constellations Puzzle was updated on October 10, 2026 and Constant Challenge on September 28, 2026.

---

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