# Structural Formulas Study vs 河原学園

The clearest difference is update cadence: 河原学園 at every 5 days against Structural Formulas Study's every 5 weeks. 河原学園 also leads on iOS requirement (16.0 vs 18.4). 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.

Structural Formulas Study ships an update every 5 weeks, 河原学園 every 5 days. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Structural Formulas Study | 河原学園 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/structural-formulas-study/id6752260162/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 5 days** |
| Monetization | Free | — |
| Size | 5 MB | 42 MB |
| Requires iOS | 18.4 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jun Yamabe](https://appshunter.io/developer/1732682049) | [GenAi K.K.](https://appshunter.io/developer/1568976798) |

## What reviewers say

### Structural Formulas Study

[App page](https://appshunter.io/ios/app/structural-formulas-study/id6752260162)

Explore and study over 100 molecular structures with detailed properties and clear diagrams. This app offers quick search and filtering for efficient exam preparation and daily learning, with offline access available.

**Highlights:** 100+ molecular structures, Detailed structural formulas, Essential chemical properties, Quick search and filters, Offline access, Exam preparation tool

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

**In-app purchases:** none


### 河原学園

[App page](https://appshunter.io/ios/app/id6763481711)

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

**In-app purchases:** none


## Frequently asked questions

### Is Structural Formulas Study free?

Structural Formulas Study is free to download, with no in-app purchases.

### Is 河原学園 free?

河原学園 is free to download, with no in-app purchases.

### Do Structural Formulas Study or 河原学園 have ads?

Neither Structural Formulas Study nor 河原学園 shows ads.

### Which is updated more often, Structural Formulas Study or 河原学園?

Structural Formulas Study ships an update every 5 weeks, and 河原学園 every 5 days. Most recently, Structural Formulas Study was updated on October 24, 2026 and 河原学園 on October 7, 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.*