# Corowell — Screen early COVID-19 symptoms

> COVID-19 symptom screening via scent testing and questionnaire. (iPhone/iPad app by MKG Consulting UG (haftungsbeschrankt).)

- Source: https://appshunter.io/ios/app/corowell/id1534169257 (this page in markdown: same URL + `.md`)
- Developer: [MKG Consulting UG (haftungsbeschrankt)](https://appshunter.io/developer/1534169259)
- Category: Medical, Health & Fitness
- Price: Free
- Rating: 5.00/5 from 8 App Store ratings · 4 written reviews indexed
- Age rating: 17+
- Requires: iOS 13.2 · 4 MB
- Languages: Arabic, Czech, Dutch, English, French, German, Hindi, Italian, Norwegian Bokmål, Polish and 5 more
- Released: 2020-12-03
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/corowell/id1534169257/reviews.md

## What is Corowell?

Corowell offers an easy, rapid & low-cost way to objectively screen a suspected COVID-19 symptom by testing your sense of smell.

Corowell is easy, fast & non-invasive. 

This is how it works:

1. Scan the QR Code inside the Corowell Ticket (sold separately)
2. Scratch the Scent Field
3. Smell it
4. Select the correct Scent in the app
5. Answer the Questionnaire
6. Get your Pass

Add the Corowell Pass to your Apple Wallet and present it quickly wherever the Corowell service is offered.

The latest scientific data indicates that the majority of those infected with Covid-19 experience a loss of the sense of smell (Anosmia) as the first symptom, typically within 1-3 days of initial infection.

Sources:
„The occurrence of olfaction dysfunction with COVID-19 is demonstrated to be frequent, respectively from (...) 86% of cases.“ (Yan CH, Faraji F, Prajapati DP et al. 

“Association of chemosensory dysfunction and Covid-19 in patients presenting with influenza-like symptoms”. Int Forum Allergy Rhinol 2020;10(7):806-813.)

„Olfactory dysfunction has been shown to be the strongest predictor of COVID-19 positivity when compared to other symptoms“ (Rocke J, Hopkins C, Philpott C et al. 

“Is loss of smell a diagnostic marker in COVID-19: A systematic review and meta-analysis”. Clin Otolaryngol 2020 Aug 1: 10.1111/coa.13620. doi: 10.1111/coa.13620.

## Key features

- Scent testing for COVID-19 symptoms
- QR code integration
- Questionnaire for symptom assessment
- Digital pass generation
- Apple Wallet integration
- Non-invasive screening

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/corowell/id1534169257/reviews.md

### 5/5 — Amazing

*2021-11-29, version 1.0.2*

Wow this is such a great product, so easy and efficient!

### 5/5 — Easy to Use

*2021-08-11, version 1.0.2*

This test was very easy & I didn’t have to have a swab jammed up my nose.  I got the results in less than 60 seconds I use these at my hotels they work great!

### 5/5 — Great Product

*2021-08-05, version 1.0.2*

This product works great with the app I got my results in 1 min or so.  Perfect for screening COVID symptoms

### 5/5 — Interesting and seems to work?

*2021-08-05, version 1.0.2*

First - very easy to use. Get the app, scan the QR code, do the sniff test, answer some questions get a result within moments. 

Secondly, so much better than swabbing…..

## Frequently asked questions about Corowell

### How does Corowell work?

Corowell works by guiding you to scan a QR code on a Corowell Ticket, scratch a scent field, smell it, and then select the correct scent within the app. You will also answer a questionnaire to receive your digital pass.

### What is the Corowell Ticket?

The Corowell Ticket is sold separately and contains the QR code and scent field necessary to use the Corowell app for symptom screening.

### Can I add my Corowell Pass to my Apple Wallet?

Yes, the Corowell Pass can be added to your Apple Wallet for quick and easy presentation wherever the Corowell service is accepted.

### What is the scientific basis for Corowell's method?

Scientific data indicates that loss of smell is a frequent early symptom of COVID-19, occurring in a majority of cases, and is a strong predictor of positivity.

### What is the age rating for Corowell?

Corowell has an age rating of 17+, suggesting it is intended for adult users or those who have reached that level of maturity.

### What devices does Corowell support?

Corowell is supported on iPhone, iPad, and iPod devices, indicating compatibility with Apple's mobile operating system.

### When was Corowell last updated?

Corowell was last updated on December 8, 2021, with version 1.0.4 being the latest release.

### What is the user rating for Corowell?

Corowell has a high user rating of 5.0 stars based on 8 ratings, indicating strong user satisfaction.

## Version history (last 1 release)

### 1.0.4 — 2021-12-08

Improve Wording

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## More apps by MKG Consulting UG (haftungsbeschrankt)

- [Corowell Guard](https://appshunter.io/ios/app/corowell-guard/id1534281792)

All apps by MKG Consulting UG (haftungsbeschrankt): https://appshunter.io/developer/1534169259

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*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 2026-06-10.*