# Structural Formulas Study vs DNA Viewer

The clearest difference is price: Structural Formulas Study at Free against DNA Viewer's $4.99. DNA Viewer's advantage is update cadence (every 2 days vs every 5 weeks) and iOS requirement (15.0 vs 18.4). On ads, in-app purchases and device support there is nothing between them.

Structural Formulas Study is free to download; DNA Viewer costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Structural Formulas Study ships an update every 5 weeks, DNA Viewer every 2 days. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Structural Formulas Study | DNA Viewer |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| 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 2 days** |
| Monetization | Free | — |
| Size | 5 MB | 4 MB |
| Requires iOS | 18.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Jun Yamabe](https://appshunter.io/developer/1732682049) | [JONG HYUN LEE](https://appshunter.io/developer/1739037759) |

## 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


### DNA Viewer

[App page](https://appshunter.io/ios/app/dna-viewer/id6754238579)

**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 DNA Viewer free?

DNA Viewer costs $4.99, with no in-app purchases.

### Do Structural Formulas Study or DNA Viewer have ads?

Neither Structural Formulas Study nor DNA Viewer shows ads.

### Which is updated more often, Structural Formulas Study or DNA Viewer?

Structural Formulas Study ships an update every 5 weeks, and DNA Viewer every 2 days. Most recently, Structural Formulas Study was updated on October 30, 2026 and DNA Viewer on October 28, 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.*