# QuantOn Cal > IBD inflammatory status monitoring tool using rapid calprotectin tests. (iPhone/iPad app by Preventis GmbH.) - Source: https://appshunter.io/ios/app/quanton-cal/id904557950 (this page in markdown: same URL + `.md`) - Developer: [Preventis GmbH](https://appshunter.io/developer/904557953) - Category: Medical, Health & Fitness - Price: Free - Rating: 1.00/5 from 3 App Store ratings · 21 written reviews indexed - Age rating: 17+ - Requires: iOS 11.0 · 13 MB - Languages: American English, Arabic, Danish, Dutch, Finnish, French (France), German (Germany), Greek, Hebrew, Italian and 6 more - Released: 2021-02-08 - Data updated: 2026-09-06 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/quanton-cal/id904557950/reviews.md ## What is QuantOn Cal? *** This App requires devices with built in camera and camera light. *** ***Please see www.quantoncal.com for a full list of supported devices and operating systems.*** This application is a monitoring tool for your IBD inflammatory status. When you are suffering from IBD (inflammatory bowel disease), you need a reliable and convenient therapy monitoring to avoid severe inflammatory phases, which cause uneasiness and pain. The QuantOnCal® test system consists of the QuantOnCal® app and the rapid test for human calprotectin – both easy to use everywhere. Monitoring IBD with the biomarker calprotectin means early indication of an inflammation before clinical symptoms arise. The QuantOnCal® app calculates the results of the rapid test for calprotectin in stool. High calprotectin levels correspond to high inflammatory activity. The test result is indicated on your smartphone screen and immediately sent to your doctor. The doctor evaluates each result and decides whether you need further assessment of your therapy. In order to use QuantOnCal® just contact a medical practitioner who participates in this program. Please find further information here http://www.quantoncal.com Please notice that the app will not run on an iPad as it requires an camera light. ## Key features - IBD inflammatory status monitoring - Rapid calprotectin test analysis - Early inflammation indication - Results sent to doctor - Therapy assessment support ## Recent user reviews (10 of 21) All indexed reviews: https://appshunter.io/ios/app/quanton-cal/id904557950/reviews.md ### 1/5 — Not scanning *2026-05-31* My iPhone is compatible with the app, no meter what I try the photo scan test impossible to pass. ### 4/5 — Works fine *2025-10-16* There’s a high potential for user error here, but if you carefully follow all the steps, it works. **Developer response:** Dear Customer, Thank you very much for your feedback. We would like to take care of your concern. Please contact info@preventis.com directly so that we can assist you further. Best regards, Your Preventis Team ### 1/5 — L’app n’ouvre plus *2025-10-11* Depuis que j’ai mon i-phone 16 et que la dernière mise à jour d’Apple a été fait, l’application n’ouvre plus… ça me dit que l’application n’est malheureusement plus supporté par mon appareil ou mon système d’exploitation. J’ai téléphoné chez Dynacare et ils sont incapables de m’aider !!!! **Developer response:** Dear Customer, Thank you very much for your. We would like to take care of your concern. Please contact info@preventis.com directly so that we can assist you further. Best regards, Your Preventis Team ### 1/5 — Seriously *2025-08-22* The app sets a timer but it’s completely silent when it goes off so of course you miss it unless you are hovering over it for 15 minutes or set a separate timer. ### 1/5 — Waste time *2025-07-10* This is not related to phone or iOS version, just can't pass the camera test no matter how you scan it. Had to switch to manual test process. ### 1/5 — Useless *2025-05-08* Won’t work on iOS 18. ### 1/5 — Waste of my time *2025-02-11* Absolute waste of my time several times now. Does not support iPhone 16. ### 1/5 — Absolutely useless. 100% buggy code. *2024-12-06* I’ve used this for multiple tests and it never works. There is always an error when I go to scan the final test - the lighting is off, the control line can’t be seen, etc. By the time you get the test scanned, the 2 minutes is up and your results are deemed invalid. This is especially stupid because you can restart the 15 minute timer in the previous step as many times as you want - so you could hypothetically wait hours to scan your results, rather than the required 15 minutes, but as long as you scan the test within the required 2 minutes on the last step, it will be deemed valid. So incredibly frustrating. ### 1/5 — App won’t scan *2024-11-02* App will scan the two camera tests, then it will scan the patient code but then during the test it asks you to scan the patient code again and the app freezes. ### 1/5 — App doesn’t work *2024-03-09* Can’t even get passed the scan test part of the app, it won’t focus when it is in scan mode. Faulty app. Embarrassing. ## Frequently asked questions about QuantOn Cal ### What is QuantOn Cal used for? QuantOn Cal is a monitoring tool for your IBD inflammatory status. It helps detect early signs of inflammation by analyzing rapid calprotectin tests, allowing for timely therapy adjustments. ### How does QuantOn Cal work? You use the app to calculate results from a rapid calprotectin test in stool. High levels indicate inflammation, and the results are sent to your doctor for evaluation. ### What devices are compatible with QuantOn Cal? QuantOn Cal requires devices with a built-in camera and camera light. It is supported on iPhone and iPod, but not on iPad, as it needs the camera light feature. ### Is QuantOn Cal free to use? Yes, QuantOn Cal is available for free. The application itself does not have any associated costs. ### How often is QuantOn Cal updated? The latest version, 2.1.14, was last updated on May 21, 2025. Updates typically address performance improvements and bug fixes. ### What is the age rating for QuantOn Cal? QuantOn Cal has an age rating of 17+. This is common for medical applications that require a certain level of understanding or are intended for adult use. ### What is the user sentiment for QuantOn Cal? Based on the available data, QuantOn Cal has a rating of 1.0 stars from 3 ratings. This indicates a very low user satisfaction at this time. ### Where can I find more information about QuantOn Cal? More information, including a full list of supported devices and operating systems, can be found at www.quantoncal.com. You can also contact a participating medical practitioner. ## Version history (last 5 releases) ### 2.1.14 — 2025-05-21 in Canada users must confirm the scanned patient barcode by entering the last 4 digits ### 2.1.13 — 2024-09-26 Bug fixes ### 2.1.12 — 2024-07-22 Adjustments to support current iPhones ### 2.1.11 — 2022-03-14 Small bug fixes ### 2.1.10 — 2020-10-23 Small bug fixes ## Apps similar to QuantOn Cal | App | Rating | Price | Category | | --- | --- | --- | --- | | [Ulcerative Colitis Tracker](https://appshunter.io/ios/app/ulcerative-colitis-tracker/id1664896729) | 5.0 (4) | Free | Medical | | [LyfeMD](https://appshunter.io/ios/app/lyfemd/id1563902775) | 1.0 (1) | Free | Medical | | [Opal - Patient in the loop](https://appshunter.io/ios/app/opal-patient-in-the-loop/id1446920350) | — | Free | Medical | ## More apps by Preventis GmbH - [SmarTest Vitamin D](https://appshunter.io/ios/app/smartest-vitamin-d/id1438416473) - [SmarTest FIT](https://appshunter.io/ios/app/smartest-fit/id1474974760) - [SmarTest Calprotectin](https://appshunter.io/ios/app/smartest-calprotectin/id1543743114) - [SmarTest Ferritin](https://appshunter.io/ios/app/smartest-ferritin/id1597726587) All apps by Preventis GmbH: https://appshunter.io/developer/904557953 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-06.*