# Blue2Factor vs GDSII Viewer

The clearest difference is rating: Blue2Factor at 5.0 against GDSII Viewer's 1.0. Blue2Factor also leads on in-app purchases (none vs 4) and device support (4 vs 2). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. GDSII Viewer sells 4 in-app purchases, starting at $0.99 per month. Blue2Factor asks for nothing beyond the download.

Blue2Factor holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 1, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Blue2Factor | GDSII Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/blue2factor/id1601861068/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/gdsii-viewer/id6502424439/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 11 MB | 13 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Christopher McLain](https://appshunter.io/developer/1107662428) | [AIP Technology Corporation, Taiwan Branch](https://appshunter.io/developer/1733199040) |

## What reviewers say

### Blue2Factor

[App page](https://appshunter.io/ios/app/blue2factor/id1601861068)

This app offers seamless and secure authentication using proximity, biometrics, and encryption. It integrates with SAML for single sign-on, creating a frictionless user experience.

**Highlights:** Invisible first and second factor authentication, Single sign-on via SAML, Proximity verification, Biometric authentication, Asymmetric encryption, Frictionless and secure environment

**In-app purchases:** none


### GDSII Viewer

[App page](https://appshunter.io/ios/app/gdsii-viewer/id6502424439)

This utility allows users to view and analyze GDSII files, essential for semiconductor design. It offers high precision viewing, layer management, and detailed inspection tools to streamline integrated circuit design processes.

**Highlights:** High precision GDSII file viewing, Layer management and toggling, Zoom and pan functionality, Detailed inspection tools, Streamlines IC design process

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Viewer(Monthly) | $0.99 | per month |
| Viewer(Annual) | $9.99 | per year |
| Editor(Monthly) | $9.99 | per month |
| Editor(Annual) | $99.99 | per year |


## Frequently asked questions

### Is Blue2Factor free?

Blue2Factor is free to download, with no in-app purchases.

### Is GDSII Viewer free?

GDSII Viewer is free to download, with in-app purchases available.

### Which has better reviews, Blue2Factor or GDSII Viewer?

Blue2Factor is rated higher. Blue2Factor averages 5.0 out of 5 from 1 ratings, while GDSII Viewer averages 1.0 from 1 ratings.

### Do Blue2Factor or GDSII Viewer have ads?

Neither Blue2Factor nor GDSII Viewer shows ads.

### Which is updated more often, Blue2Factor or GDSII Viewer?

Blue2Factor ships an update every 2 months, and GDSII Viewer every 2 months. Most recently, Blue2Factor was updated on October 1, 2026 and GDSII Viewer 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.*