# Chem AI vs Structural Formulas Study

The clearest difference is in-app purchases: Structural Formulas Study at none against Chem AI's 4. Structural Formulas Study also leads on rating (5.0 vs 4.7). Chem AI's advantage is ratings volume (81 vs 1) and iOS requirement (13.0 vs 18.4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Chem AI sells 3 in-app purchases, starting at $2.99 per 7 days. Structural Formulas Study asks for nothing beyond the download.

Structural Formulas Study holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Chem AI has 81 ratings behind it against 1, so its average is the more settled of the two.

Chem AI ships an update every 3 weeks, Structural Formulas Study every 5 weeks. The most recent releases landed on October 6, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Chem AI | Structural Formulas Study |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (81 ratings)](https://appshunter.io/ios/app/chem-ai-chemistry-solver/id6739063555/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/structural-formulas-study/id6752260162/reviews)** |
| Number of ratings | **81** | 1 |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 49 MB | 5 MB |
| Requires iOS | **13.0** | 18.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [树鑫 赖](https://appshunter.io/developer/1680833127) | [Jun Yamabe](https://appshunter.io/developer/1732682049) |

## What reviewers say

### Chem AI

[App page](https://appshunter.io/ios/app/chem-ai-chemistry-solver/id6739063555)

Instantly solve chemistry problems by taking a picture or typing your query. Access an interactive periodic table, draw chemical structures, and calculate molar mass with this AI-powered assistant.

**Highlights:** Snap and solve chemistry questions, Text-based query solver, Interactive periodic table, Chemical structure drawing, Molar mass calculator, Detailed explanations

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $2.99 | per 7 days |
| Monthly Plan | $7.99 | per month |
| Yearly Plan | $34.99 | per year |


### 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


## Frequently asked questions

### Is Chem AI free?

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

### Is Structural Formulas Study free?

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

### Which has better reviews, Chem AI or Structural Formulas Study?

Structural Formulas Study is rated higher. Chem AI averages 4.7 out of 5 from 81 ratings, while Structural Formulas Study averages 5.0 from 1 ratings.

### Do Chem AI or Structural Formulas Study have ads?

Neither Chem AI nor Structural Formulas Study shows ads.

### Which is updated more often, Chem AI or Structural Formulas Study?

Chem AI ships an update every 3 weeks, and Structural Formulas Study every 5 weeks. Most recently, Chem AI was updated on October 6, 2026 and Structural Formulas Study on October 12, 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.*