ONIS vs ARK.ai
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ONIS
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ONIS Shot allows you to convert photos and videos to DICOM format and send them to a PACS. For each study, you can enter patient data, or retrieve them directly from a PACS server. This utility only works with a specific associated server, please contact us for more details.
ARK.ai
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ARK is a revolutionary zero-coding platform that offers “Algorithms as a service”, and expedites production of clinically validated medical imaging AI algorithms by the top healthcare systems and academic research centers around the globe. This app extends ARK’s experiment tracking to your smartphone and tablet. · Review your Classification and Segmentation projects · Determine the status of your experiments through an overview dashboard · Analyze your experiment metadata to determine viability · Quickly pause or stop a running experiment when needed. We welcome all comments and reviews for the ARK mobile app. For inquiries or support, kindly send an email to: mobile.support@paxerahealth.com and a support engineer will respond within 24 hours. Please write your name, organization, ARK version number, full description of the problem and, if possible, provide screen shots of the problem.
Screenshots
Verdict
The clearest difference is iOS requirement: ONIS at 9.0 against ARK.ai's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ONIS ships an update every 5 weeks, ARK.ai monthly. The most recent releases landed on October 27, 2026 and October 7, 2026 respectively.
| Parameter | ONIS | ARK.ai |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 weeks | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 55 MB | 197 MB |
| Age rating | 17+ | 4+ |
| Developer | DigitalCore Corporation | PaxeraHealth Corp |
In-app purchases
ONIS
No in-app purchases
ARK.ai
No in-app purchases








