# iDO Viewer vs iOptima

The clearest difference is rating: iDO Viewer at 4.3 against iOptima's 3.4. iDO Viewer also leads on review sentiment (100% vs 60%). On price, ratings volume, update cadence and ads there is nothing between them.

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

iDO Viewer holds the better App Store score, 4.3 against 3.4. Both are backed by a comparable volume of ratings — 3 and 8 respectively. Written reviews point the same way: 100% of iDO Viewer's written reviews are positive against 60% of iOptima's.

iDO Viewer ships an update every 3 months, iOptima every 5 months. The most recent releases landed on September 7, 2026 and August 12, 2026 respectively.

## The numbers

| Metric | iDO Viewer | iOptima |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/ido-viewer/id494179581/reviews)** | [3.4 (8 ratings)](https://appshunter.io/ios/app/ioptima/id870426158/reviews) |
| Number of ratings | 3 | **8** |
| Positive reviews | **100.0% of reviews** | 60.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | Free | Free |
| Size | 26 MB | 219 MB |
| Requires iOS | **12.1** | 12.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [EBM Technologies, Incorporated.](https://appshunter.io/developer/404511773) | [Bien-Air Dental SA](https://appshunter.io/developer/496222443) |

## What reviewers say

### iDO Viewer

[App page](https://appshunter.io/ios/app/ido-viewer/id494179581)

This application allows medical professionals to view multi-modality medical images and files from PACS servers on their mobile devices. It supports various imaging formats and offers tools for image manipulation and organization.

**Highlights:** Multi-modality imaging support, PACS server integration, Image manipulation (pan, zoom, window level), Support for JPG, BMP, PDF files, Quick layout adjustment, Fast image and data access

**In-app purchases:** none


### iOptima

[App page](https://appshunter.io/ios/app/ioptima/id870426158)

Enhance dental procedures with advanced technology. This application integrates with dental units to offer customizable settings for restorative, endodontic, oral surgery, and scaling tasks. It provides pre-programmed sequences and troubleshooting guides for efficient and safe practice.

**Highlights:** Seamlessly adds latest technology to dental units, Customizable settings for speed, torque, and direction, Pre-programmed sequences for endodontics and implantology, Supports restorative, endodontics, oral surgery, and scaling, Integrated troubleshooting guides, Ergonomic iPod touch and iPad mini interface

**In-app purchases:** none


## Frequently asked questions

### Is iDO Viewer free?

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

### Is iOptima free?

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

### Which has better reviews, iDO Viewer or iOptima?

iDO Viewer is rated higher. iDO Viewer averages 4.3 out of 5 from 3 ratings, while iOptima averages 3.4 from 8 ratings.

### Do iDO Viewer or iOptima have ads?

Neither iDO Viewer nor iOptima shows ads.

### Which is updated more often, iDO Viewer or iOptima?

iDO Viewer ships an update every 3 months, and iOptima every 5 months. Most recently, iDO Viewer was updated on September 7, 2026 and iOptima on August 12, 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.*