# Peridic Table vs Structural Formulas Study

The clearest difference is in-app purchases: Structural Formulas Study at none against Peridic Table's 6. Peridic Table's advantage is iOS requirement (15.6 vs 18.4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Peridic Table sells 6 one-off in-app purchases. Structural Formulas Study asks for nothing beyond the download.

Peridic Table ships an update every 2 months, Structural Formulas Study every 5 weeks. The most recent releases landed on June 4, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Peridic Table | Structural Formulas Study |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/peridic-table/id6743040165/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 56 MB | 5 MB |
| Requires iOS | **15.6** | 18.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ethar Shrouf](https://appshunter.io/developer/1611749293) | [Jun Yamabe](https://appshunter.io/developer/1732682049) |

## What reviewers say

### Peridic Table

[App page](https://appshunter.io/ios/app/peridic-table/id6743040165)

Explore chemistry with an interactive periodic table app. It offers gamified learning, detailed element profiles, and useful chemistry tools like a calculator and solubility chart. Designed for students and science enthusiasts to deepen their understanding.

**Highlights:** Gamified learning with chemistry games, Advanced element sorting and filtering, Chemistry calculator for equations, Detailed element profiles with real-life images, Solubility table, Powerful element search function

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Donate 1.99$ For Support App | $1.99 | one-time |
| Donate 5.99$ For Support App | $5.99 | one-time |
| Donate 9.99$  For Support App | $9.99 | one-time |
| Donate 19.99 For Support App | $19.99 | one-time |
| Donate 50$ For Support App | $49.99 | one-time |
| Donate 100$ For Support App | $100.00 | one-time |


### Structural Formulas Study

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Peridic Table free?

Peridic 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.

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

Neither Peridic Table nor Structural Formulas Study shows ads.

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

Peridic Table ships an update every 2 months, and Structural Formulas Study every 5 weeks. Most recently, Peridic Table was updated on June 4, 2026 and Structural Formulas Study on September 20, 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.*