# VidistarViewer vs ONIS

The clearest difference is update cadence: ONIS at every 5 weeks against VidistarViewer's every 30 months. ONIS also leads on iOS requirement (9.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

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

VidistarViewer ships an update every 30 months, ONIS every 5 weeks. The most recent releases landed on October 17, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | VidistarViewer | ONIS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/vidistarviewer/id590259379/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 1 MB | 55 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [VidiStar, LLC](https://appshunter.io/developer/590259382) | [DigitalCore Corporation](https://appshunter.io/developer/1277558983) |

## What reviewers say

### VidistarViewer

[App page](https://appshunter.io/ios/app/vidistarviewer/id590259379)

Access and review medical images, videos, and diagnostic reports instantly on your mobile device. Enhance patient understanding by showing them their studies directly. Supports various diagnostic DICOM studies for comprehensive review.

**Highlights:** Instant access to medical images and reports, View still images and video clips, Review diagnostic DICOM studies, Access patient information, Review studies from any location, Patient engagement tool

**Features:** macOS Compatibility

**In-app purchases:** none


### ONIS

[App page](https://appshunter.io/ios/app/onis-shot/id1542493531)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VidistarViewer free?

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

### Is ONIS free?

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

### Do VidistarViewer or ONIS have ads?

Neither VidistarViewer nor ONIS shows ads.

### Which is updated more often, VidistarViewer or ONIS?

VidistarViewer ships an update every 30 months, and ONIS every 5 weeks. Most recently, VidistarViewer was updated on October 17, 2026 and ONIS on October 6, 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.*