# Chem AI vs Structural Formulas Study

The clearest difference is rating: Structural Formulas Study at 5.0 against Chem AI's 4.4. Structural Formulas Study also leads on in-app purchases (none vs 16) and ads (none vs shown). Chem AI's advantage is ratings volume (822 vs 1) and update cadence (fortnightly vs every 5 weeks). On price and device support there is nothing between them.

Both are free to download. Chem AI sells 15 in-app purchases, starting at $0.99 per 7 days. Structural Formulas Study asks for nothing beyond the download.

Structural Formulas Study holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Chem AI has 822 ratings behind it against 1, so its average is the more settled of the two.

Chem AI ships an update fortnightly, Structural Formulas Study every 5 weeks. The most recent releases landed on October 20, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Chem AI | Structural Formulas Study |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (822 ratings)](https://appshunter.io/ios/app/chem-ai-chemistry-solver/id6471891010/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/structural-formulas-study/id6752260162/reviews)** |
| Number of ratings | **822** | 1 |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Monetization | Subscription | **Free** |
| Size | 149 MB | 5 MB |
| Requires iOS | **16.0** | 18.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ZipoApps](https://appshunter.io/developer/1671444635) | [Jun Yamabe](https://appshunter.io/developer/1732682049) |

## What reviewers say

### Chem AI

[App page](https://appshunter.io/ios/app/chem-ai-chemistry-solver/id6471891010)

Instantly solve any chemistry problem with step-by-step explanations. Upload or photograph your questions, and get detailed solutions for various chemistry topics, from high school to advanced research. Offers a free trial before subscription.

**Highlights:** Photo recognition for chemistry problems, Step-by-step solution explanations, Supports high school to doctoral research topics, Detailed math solutions, Copy and share solutions

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

**In-app purchases (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $0.99 | per 7 days |
| Unlimited Access | $2.99 | per 7 days |
| Unlimited Access | $3.99 | per 7 days |
| Unlimited Access | $4.99 | per 7 days |
| Unlimited Access | $5.99 | per 7 days |
| Chem AI - Chem Solver Weekly | $5.99 | per 7 days |
| Unlimited Access | $6.99 | per 7 days |
| Unlimited Access | $7.99 | per 7 days |
| Unlimited Access | $8.99 | per 7 days |
| Unlimited Access | $9.99 | per year |
| Unlimited Access | $19.99 | per month |
| Unlimited Access | $29.99 | per year |
| Chem AI - Chem Solver Yearly | $34.99 | per year |
| Unlimited Access | $39.99 | per year |
| Unlimited Access | $49.99 | per year |

**What reviewers like**

- 🚀 Quick problem solving
- 💡 Helpful for chemistry courses
- 👍 Easy to use

**What reviewers complain about**

- 🐛 Incorrect answers
- 🔒 Subscription issues
- 💰 Expensive
- 🤔 Limited functionality in advanced courses

**Reported bugs**

- Freezes or goes blank when trying to get answers
- Incompatible with some chemistry problems

**Requested features**

- Improve accuracy for organic chemistry and physical chemistry
- Add step-by-step explanations for free users
- Improve subscription management and cancellation process


### 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 4.4 out of 5 from 822 ratings, while Structural Formulas Study averages 5.0 from 1 ratings.

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

Chem AI shows ads; Structural Formulas Study does not.

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

Chem AI ships an update fortnightly, and Structural Formulas Study every 5 weeks. Most recently, Chem AI was updated on October 20, 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.*