# Phocus Mobile vs GRImageViewer

The clearest difference is rating: Phocus Mobile at 4.6 against GRImageViewer's 3.4. Phocus Mobile also leads on in-app purchases (none vs 1) and ads (none vs shown). GRImageViewer's advantage is iOS requirement (14.0 vs 16.2). On price, review sentiment, update cadence and device support there is nothing between them.

Both are free to download. GRImageViewer sells 1 one-off in-app purchase. Phocus Mobile asks for nothing beyond the download.

Phocus Mobile holds the better App Store score, 4.6 against 3.4. That said, the two scores are not equally well evidenced: Phocus Mobile has 522 ratings behind it against 42, so its average is the more settled of the two. Written reviews complicate that: 47% of Phocus Mobile's written reviews are positive against 52% of GRImageViewer's, so the app with the better star average is not the one people write more warmly about.

Phocus Mobile ships an update every 2 weeks, GRImageViewer every 3 weeks. The most recent releases landed on October 1, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Phocus Mobile | GRImageViewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (522 ratings)](https://appshunter.io/ios/app/phocus-mobile/id1452280435/reviews)** | [3.4 (42 ratings)](https://appshunter.io/ios/app/grimageviewer/id1530691089/reviews) |
| Number of ratings | **522** | 42 |
| Positive reviews | 46.6% of reviews | **51.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 435 MB | 26 MB |
| Requires iOS | 16.2 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hasselblad](https://appshunter.io/developer/411637577) | [Pin Chih Lin](https://appshunter.io/developer/999376709) |

## What reviewers say

### Phocus Mobile

[App page](https://appshunter.io/ios/app/phocus-mobile/id1452280435)

Edit and manage high-resolution RAW images from Hasselblad cameras on your mobile device. Experience natural color reproduction and advanced noise reduction with HDR capabilities for stunning detail and light.

**Highlights:** HNCS HDR image display, editing, and export, Full quality RAW editing, Multi-format RAW/JPG/HEIF download, TIFF generation for lossless editing, Camera control of capture parameters, Download/delete images from camera

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Blazing fast WiFi connectivity and file transfer speeds
- 🎨 Superior color rendering and Hasselblad Natural Color Solution (HNCS)
- 📱 Excellent remote camera control and tethered shooting capabilities
- 🖼️ Clean, intuitive user interface design
- ⚡ Quick connection to camera and effortless browsing of large files

**What reviewers complain about**

- 🐛 Frequent crashes and freezes, especially on iPad
- 🔌 USB-C connectivity issues with newer iPad models
- 📦 Limited storage options for large RAW files on mobile devices
- 🔗 Unreliable WiFi connection stability
- ⚠️ Inconsistent app performance across updates

**Reported bugs**

- App crashes when opening high ISO files
- Photos disappear after update or when selecting for processing
- Export fails for multiple images, erasing original capture date/time
- Images not available in library despite camera connection
- App crashes on iPad Pro with M1/M2 chips

**Requested features**

- Import photos from external SSD or USB storage
- Manual color control for watermarks
- Support for multiple camera connections
- Layer masking and adjustment layers
- Delayed shutter release/self-timer functionality


### GRImageViewer

[App page](https://appshunter.io/ios/app/grimageviewer/id1530691089)

Easily browse, view, and transfer photos from your Ricoh GR III/x camera wirelessly. This app offers remote capture, metadata viewing, and efficient photo management with features like grid layout and date sorting.

**Highlights:** Browse GR III/x photos via WiFi, Remote camera capture, Grid layout for photo browsing, Transfer photos to device, View photo metadata, Geotagging support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


## Frequently asked questions

### Is Phocus Mobile free?

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

### Is GRImageViewer free?

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

### Which has better reviews, Phocus Mobile or GRImageViewer?

Phocus Mobile is rated higher. Phocus Mobile averages 4.6 out of 5 from 522 ratings, while GRImageViewer averages 3.4 from 42 ratings.

### Do Phocus Mobile or GRImageViewer have ads?

GRImageViewer shows ads; Phocus Mobile does not.

### Which is updated more often, Phocus Mobile or GRImageViewer?

Phocus Mobile ships an update every 2 weeks, and GRImageViewer every 3 weeks. Most recently, Phocus Mobile was updated on October 1, 2026 and GRImageViewer on September 29, 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.*