# Chemistry. Periodic table. AI vs Structural Formulas Study

The clearest difference is in-app purchases: Structural Formulas Study at none against Chemistry. Periodic table. AI's 12. Structural Formulas Study also leads on ads (none vs shown). Chemistry. Periodic table. AI's advantage is ratings volume (2.7K vs 1) and update cadence (fortnightly vs every 5 weeks). On price and rating there is nothing between them.

Both are free to download. Chemistry. Periodic table. AI sells 9 in-app purchases, starting at $1.99 per 7 days. Structural Formulas Study asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Chemistry. Periodic table. AI against 5.0 for Structural Formulas Study. That said, the two scores are not equally well evidenced: Chemistry. Periodic table. AI has 2.7K ratings behind it against 1, so its average is the more settled of the two.

Chemistry. Periodic table. 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 | Chemistry. Periodic table. AI | Structural Formulas Study |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (2.7K ratings)](https://appshunter.io/ios/app/chemistry-periodic-table-ai/id493558583/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/structural-formulas-study/id6752260162/reviews)** |
| Number of ratings | **2.7K** | 1 |
| Positive reviews | 84.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 71 MB | 5 MB |
| Requires iOS | **13.0** | 18.4 |
| Devices | **iPhone, iPad, iPod, Apple TV, Apple Watch, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Denis Chashchin](https://appshunter.io/developer/493558586) | [Jun Yamabe](https://appshunter.io/developer/1732682049) |

## What reviewers say

### Chemistry. Periodic table. AI

[App page](https://appshunter.io/ios/app/chemistry-periodic-table-ai/id493558583)

Explore an interactive periodic table with 3D models and AR features. This app offers an AI-powered tutor for simplified explanations, a reaction solver, and a molar mass calculator. It's a comprehensive reference for students and professionals to learn chemistry effectively.

**Highlights:** Interactive Periodic Table with 3D models, AI-powered chemistry tutor (ChemAI), Chemical reaction solver, Molar mass calculator, Augmented Reality (AR) elements, Home screen widgets for elements

**Features:** macOS Compatibility, Family Sharing, Apple Watch app

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chemistry Pro | $1.99 | per 7 days |
| Chemistry Pro | $2.99 | per year |
| Chemistry Pro | $2.99 | per 3 months |
| ChemAI Tutor | $2.99 | per month |
| Chemistry Pro | $3.99 | per 3 months |
| Chemical Elements Info | $7.99 | one-time |
| Chemistry Pro | $12.99 | one-time |
| Chemistry Pro | $17.49 | one-time |
| Chemistry Pro | $34.99 | one-time |

**What reviewers like**

- 👍 Convenient and easy to use
- 🚀 Helpful for chemistry studies
- 💡 Detailed periodic table and element information
- 🔍 Useful features like molar mass calculator and reaction balancer

**What reviewers complain about**

- 🐛 Some data inaccuracies or errors
- 💰 Subscription model for premium features
- 🔋 Potential battery drain issues

**Reported bugs**

- Crashes or freezes when opening certain sections
- Search function not working as expected for some elements

**Requested features**

- Add electronegativity values to periodic table
- Improve chemical equation balancing functionality
- Implement a dark mode option
- Highlight/compare elements on periodic table


### 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 Chemistry. Periodic table. AI free?

Chemistry. Periodic table. 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, Chemistry. Periodic table. AI or Structural Formulas Study?

Structural Formulas Study is rated higher. Chemistry. Periodic table. AI averages 4.9 out of 5 from 2.7K ratings, while Structural Formulas Study averages 5.0 from 1 ratings.

### Do Chemistry. Periodic table. AI or Structural Formulas Study have ads?

Chemistry. Periodic table. AI shows ads; Structural Formulas Study does not.

### Which is updated more often, Chemistry. Periodic table. AI or Structural Formulas Study?

Chemistry. Periodic table. AI ships an update fortnightly, and Structural Formulas Study every 5 weeks. Most recently, Chemistry. Periodic table. 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.*