# Opacity vs GelDoc Imager

The clearest difference is update cadence: Opacity at every 2 weeks against GelDoc Imager's every 4 months. On price, ads, in-app purchases and monetization model there is nothing between them.

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

Opacity ships an update every 2 weeks, GelDoc Imager every 4 months. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Opacity | GelDoc Imager |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/opacity/id6743722717/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 4 months |
| Monetization | Free | Free |
| Size | 74 MB | 2 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Opacity Labs](https://appshunter.io/developer/1751419895) | [Vincent Pennetti](https://appshunter.io/developer/1856392443) |

## What reviewers say

### Opacity

[App page](https://appshunter.io/ios/app/opacity/id6743722717)

Securely store and manage your digital identity, including logins and credentials. Prove facts about yourself without revealing sensitive data, and share verified information with full transparency. Maintain control over your online presence and reputation.

**Highlights:** Private, verified identity vault, Store logins and credentials, Prove identity facts without data exposure, Share verified information transparently, Connect and manage accounts, Build online reputation

**Features:** macOS Compatibility

**In-app purchases:** none


### GelDoc Imager

[App page](https://appshunter.io/ios/app/geldoc-imager/id6756336912)

This specialized camera app offers scientists and researchers precise manual controls for capturing high-quality images of gel electrophoresis. It features advanced settings for focus, ISO, shutter speed, and multiple lenses, along with real-time image processing and automatic metadata stamping.

**Highlights:** Manual focus with 3x zoom preview, Adjustable ISO (50-12800), Customizable shutter speed (1/8000s to 30s), Multiple lens support (ultra-wide, wide, telephoto), Real-time contrast and saturation adjustment, Automatic metadata stamping, Settings persistence between sessions

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

**In-app purchases:** none


## Frequently asked questions

### Is Opacity free?

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

### Is GelDoc Imager free?

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

### Do Opacity or GelDoc Imager have ads?

Neither Opacity nor GelDoc Imager shows ads.

### Which is updated more often, Opacity or GelDoc Imager?

Opacity ships an update every 2 weeks, and GelDoc Imager every 4 months. Most recently, Opacity was updated on October 3, 2026 and GelDoc Imager on October 7, 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.*