# Structural Formulas Study vs Periodic Table

The clearest difference is update cadence: Periodic Table at every 4 days against Structural Formulas Study's every 5 weeks. Periodic Table also leads on iOS requirement (15.0 vs 18.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Structural Formulas Study ships an update every 5 weeks, Periodic Table every 4 days. The most recent releases landed on October 12, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Structural Formulas Study | Periodic Table |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/structural-formulas-study/id6752260162/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 4 days** |
| Monetization | Free | — |
| Size | 5 MB | 21 MB |
| Requires iOS | 18.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jun Yamabe](https://appshunter.io/developer/1732682049) | [Oleg Korunov](https://appshunter.io/developer/6811071409) |

## What reviewers say

### 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


### Periodic Table

[App page](https://appshunter.io/ios/app/periodic-table-118-elements/id6811071407)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Structural Formulas Study free?

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

### Is Periodic Table free?

Periodic Table is free to download, with no in-app purchases.

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

Neither Structural Formulas Study nor Periodic Table shows ads.

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

Structural Formulas Study ships an update every 5 weeks, and Periodic Table every 4 days. Most recently, Structural Formulas Study was updated on October 12, 2026 and Periodic Table on October 4, 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.*