# Constellations Puzzle vs フラッシュ暗算DX

The clearest difference is review sentiment: Constellations Puzzle at 84% against フラッシュ暗算DX's 30%. Constellations Puzzle also leads on rating (4.8 vs 3.0) and ratings volume (21 vs 2). フラッシュ暗算DX's advantage is ads (none vs shown) and update cadence (every 3 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 3.0. That said, the two scores are not equally well evidenced: Constellations Puzzle has 21 ratings behind it against 2, 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 30% of フラッシュ暗算DX's.

Constellations Puzzle ships an update every 5 months, フラッシュ暗算DX every 3 weeks. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Constellations Puzzle | フラッシュ暗算DX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (21 ratings)](https://appshunter.io/ios/app/constellations-puzzle/id585551131/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/dx/id1058775775/reviews) |
| Number of ratings | **21** | 2 |
| Positive reviews | **84.4% of reviews** | 30.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 14 MB | 39 MB |
| Requires iOS | 13.0 | **7.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Plus Inc. (Japan)](https://appshunter.io/developer/445792061) | [Satoshi Negishi](https://appshunter.io/developer/704574251) |

## 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


### フラッシュ暗算DX

[App page](https://appshunter.io/ios/app/dx/id1058775775)

This app offers a comprehensive flash calculation experience with three distinct modes catering to all skill levels. It features multi-user support, customizable practice settings, and competitive modes with national rankings. Personalize your experience with various configuration options.

**Highlights:** Multi-user support (up to 10), Customizable practice mode, Graded certification mode (10th kyu to 10th dan), Competitive survival mode, National rankings, Configurable display and input settings

**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 フラッシュ暗算DX free?

フラッシュ暗算DX is free to download, with no in-app purchases.

### Which has better reviews, Constellations Puzzle or フラッシュ暗算DX?

Constellations Puzzle is rated higher. Constellations Puzzle averages 4.8 out of 5 from 21 ratings, while フラッシュ暗算DX averages 3.0 from 2 ratings.

### Do Constellations Puzzle or フラッシュ暗算DX have ads?

Constellations Puzzle shows ads; フラッシュ暗算DX does not.

### Which is updated more often, Constellations Puzzle or フラッシュ暗算DX?

Constellations Puzzle ships an update every 5 months, and フラッシュ暗算DX every 3 weeks. Most recently, Constellations Puzzle was updated on November 1, 2026 and フラッシュ暗算DX on November 2, 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.*