# Protein Viewer Pro vs Protein Sequence Viewer

The clearest difference is ads: Protein Viewer Pro at none against Protein Sequence Viewer's shown. Protein Sequence Viewer's advantage is update cadence (every 2 days vs every 2 weeks) and iOS requirement (13.0 vs 15.6). On price, 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.

Protein Viewer Pro ships an update every 2 weeks, Protein Sequence Viewer every 2 days. The most recent releases landed on October 15, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Protein Viewer Pro | Protein Sequence Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Size | 27 MB | 25 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Heebok Lee](https://appshunter.io/developer/1855773499) | [Kazunari Sasaki](https://appshunter.io/developer/1857860050) |

## What reviewers say

### Protein Viewer Pro

[App page](https://appshunter.io/ios/app/protein-viewer-pro/id6755710571)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Protein Sequence Viewer

[App page](https://appshunter.io/ios/app/protein-sequence-viewer/id6758012449)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Protein Viewer Pro free?

Protein Viewer Pro is free to download, with no in-app purchases.

### Is Protein Sequence Viewer free?

Protein Sequence Viewer is free to download, with no in-app purchases.

### Do Protein Viewer Pro or Protein Sequence Viewer have ads?

Protein Sequence Viewer shows ads; Protein Viewer Pro does not.

### Which is updated more often, Protein Viewer Pro or Protein Sequence Viewer?

Protein Viewer Pro ships an update every 2 weeks, and Protein Sequence Viewer every 2 days. Most recently, Protein Viewer Pro was updated on October 15, 2026 and Protein Sequence Viewer on October 5, 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.*