# Periodic Table vs Structural Formulas Study

The clearest difference is in-app purchases: Structural Formulas Study at none against Periodic Table's 11. Structural Formulas Study also leads on rating (5.0 vs 4.8). Periodic Table's advantage is update cadence (every 6 days vs every 5 weeks) and ratings volume (5.4K vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Periodic Table sells 9 in-app purchases, starting at $0.99 per month. Structural Formulas Study asks for nothing beyond the download.

Structural Formulas Study holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Periodic Table has 5.4K ratings behind it against 1, so its average is the more settled of the two.

Periodic Table ships an update every 6 days, Structural Formulas Study every 5 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Periodic Table | Structural Formulas Study |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (5.4K ratings)](https://appshunter.io/ios/app/periodic-table-chemistry-2026/id1451726577/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/structural-formulas-study/id6752260162/reviews)** |
| Number of ratings | **5.4K** | 1 |
| Positive reviews | 88.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 152 MB | 5 MB |
| Requires iOS | **16.1** | 18.4 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nikita Chernykh](https://appshunter.io/developer/1448243728) | [Jun Yamabe](https://appshunter.io/developer/1732682049) |

## What reviewers say

### Periodic Table

[App page](https://appshunter.io/ios/app/periodic-table-chemistry-2026/id1451726577)

Explore the universe's language with this interactive chemistry app. It offers a clear, visual, and fact-based approach to understanding elements, isotopes, and chemical reactions. Ideal for students, educators, and curious minds.

**Highlights:** Interactive Periodic Table, Detailed Element Cards, 3300+ Isotopes, Molar Mass Calculator, Chemistry Dictionary, Reactions & Equations, Solubility Chart & Orbital Models

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Professional: 1 Month | $0.99 | per month |
| Professional: 6 Months | $3.99 | per 6 months |
| Professional: 6 Months | $3.99 | per 6 months |
| Professional: 1 Year | $6.99 | per year |
| Professional: 1 Year | $6.99 | per year |
| Professional: 1 Year | $14.99 | per year |
| Professional: Unlimited | $14.99 | one-time |
| Professional: Unlimited | $24.99 | one-time |
| Professional: Unlimited | $59.99 | one-time |

**What reviewers like**

- 🚀 Great app for chemistry learning
- 👍 Useful information and features
- 💡 Includes theoretical elements
- 🚀 Efficient and easy to use
- 👍 Helpful for students and professionals

**What reviewers complain about**

- 🐛 Some inaccuracies in element data
- 🔒 Paid version required for full functionality
- 🔒 Certain features locked behind paywall

**Reported bugs**

- Widget shows incorrect element positions
- Electron configuration information missing for some elements

**Requested features**

- Add Arabic language support
- Improve search functionality
- Allow full periodic table view
- Add pronunciation for element names
- Include more physical constants and data


### 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 Periodic Table free?

Periodic Table 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, Periodic Table or Structural Formulas Study?

Structural Formulas Study is rated higher. Periodic Table averages 4.8 out of 5 from 5.4K ratings, while Structural Formulas Study averages 5.0 from 1 ratings.

### Do Periodic Table or Structural Formulas Study have ads?

Neither Periodic Table nor Structural Formulas Study shows ads.

### Which is updated more often, Periodic Table or Structural Formulas Study?

Periodic Table ships an update every 6 days, and Structural Formulas Study every 5 weeks. Most recently, Periodic Table was updated on October 25, 2026 and Structural Formulas Study on October 24, 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.*