# 漸化式ガチャ vs Structura

The clearest difference is price: Structura at Free against 漸化式ガチャ's $6.99. Structura also leads on ads (none vs shown) and update cadence (every 4 days vs fortnightly). 漸化式ガチャ's advantage is in-app purchases (none vs 1). On review sentiment, device support and iOS requirement there is nothing between them.

Structura is free to download; 漸化式ガチャ costs $6.99 up front. Structura sells 1 one-off in-app purchase. 漸化式ガチャ asks for nothing beyond the download.

漸化式ガチャ ships an update fortnightly, Structura every 4 days. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | 漸化式ガチャ | Structura |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | — | Freemium |
| Size | 10 MB | 100 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Akira Hiraoka](https://appshunter.io/developer/1668714727) | [SNAPLACE](https://appshunter.io/developer/6790258232) |

## What reviewers say

### 漸化式ガチャ

[App page](https://appshunter.io/ios/app/id6447540613)

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

**In-app purchases:** none


### Structura

[App page](https://appshunter.io/ios/app/structura-element-synthesis/id6795030898)

Learn chemical reactions by playing a falling-block puzzle game. Combine elements and ions to build compounds, with over 350 reactions covered. Practice recall with quizzes and tests, and experiment freely with all elements.

**Highlights:** Falling-block puzzle gameplay, Element and ion combination, 356 chemical reactions covered, 46 learning stages, In-game quizzes and tests, Free experiment mode, Visual representation of compounds

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Units | $2.99 | one-time |


## Frequently asked questions

### Is 漸化式ガチャ free?

漸化式ガチャ costs $6.99, with no in-app purchases.

### Is Structura free?

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

### Do 漸化式ガチャ or Structura have ads?

漸化式ガチャ shows ads; Structura does not.

### Which is updated more often, 漸化式ガチャ or Structura?

漸化式ガチャ ships an update fortnightly, and Structura every 4 days. Most recently, 漸化式ガチャ was updated on November 3, 2026 and Structura on November 8, 2026.

---

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