# GRImageViewer vs Pentax Image Sender

The clearest difference is review sentiment: Pentax Image Sender at 100% against GRImageViewer's 52%. Pentax Image Sender also leads on rating (4.0 vs 3.4) and in-app purchases (none vs 1). GRImageViewer's advantage is update cadence (every 3 weeks vs every 14 months) and ratings volume (42 vs 1). On price, device support and iOS requirement there is nothing between them.

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

Pentax Image Sender holds the better App Store score, 4.0 against 3.4. That said, the two scores are not equally well evidenced: GRImageViewer has 42 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 52% of GRImageViewer's written reviews are positive against 100% of Pentax Image Sender's.

GRImageViewer ships an update every 3 weeks, Pentax Image Sender every 14 months. The most recent releases landed on August 23, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | GRImageViewer | Pentax Image Sender |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (42 ratings)](https://appshunter.io/ios/app/grimageviewer/id1530691089/reviews) | **[4.0 (1 ratings)](https://appshunter.io/ios/app/pentax-image-sender/id6466134144/reviews)** |
| Number of ratings | **42** | 1 |
| Positive reviews | 51.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 14 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 26 MB | 5 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Pin Chih Lin](https://appshunter.io/developer/999376709) | [Hyunsu Lee](https://appshunter.io/developer/1706944371) |

## What reviewers say

### 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 |


### Pentax Image Sender

[App page](https://appshunter.io/ios/app/pentax-image-sender/id6466134144)

Wirelessly transfer photos and videos from compatible Ricoh and Pentax cameras to your mobile device. Supports a range of popular camera models for quick and easy file sharing.

**Highlights:** Wireless image transfer, Supports Ricoh cameras, Supports Pentax cameras, File sharing for K-1, K-3 Mk III, GR III models, Direct transfer to mobile device

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GRImageViewer free?

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

### Is Pentax Image Sender free?

Pentax Image Sender is free to download, with no in-app purchases.

### Which has better reviews, GRImageViewer or Pentax Image Sender?

Pentax Image Sender is rated higher. GRImageViewer averages 3.4 out of 5 from 42 ratings, while Pentax Image Sender averages 4.0 from 1 ratings.

### Do GRImageViewer or Pentax Image Sender have ads?

GRImageViewer shows ads; Pentax Image Sender does not.

### Which is updated more often, GRImageViewer or Pentax Image Sender?

GRImageViewer ships an update every 3 weeks, and Pentax Image Sender every 14 months. Most recently, GRImageViewer was updated on August 23, 2026 and Pentax Image Sender on June 1, 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.*