Help slow the spread of COVID-19 by self-reporting your symptoms daily, even if you feel well.

Join millions of people supporting scientists at Stanford University, Harvard University, Massachusetts General Hospital, and King's College London to help fight coronavirus by identifying:

* How fast the virus is spreading in your area
* High-risk areas in the US
* Who is most at risk, by better understanding symptoms linked to underlying health conditions

You will contribute to advance research on COVID-19 in partnership with leading health researchers globally like TwinsUK, one of the most clinically detailed studies in the world.

This app (formerly known as the Covid Symptom Tracker) allows you to help others, but does not give health advice. If you need health advice please visit the CDC website at:

This app has been designed for everyone to report their status not just those who are ill.

It was designed by doctors and scientists at King's College London, Guys and St Thomas’ Hospitals and Zoe Global Limited, a health technology company.

In the US the app is being used by the Nurses' Health Study to identify symptoms in active healthcare workers who are treating people with COVID across the country and risking their own health to help us.

In response to recommendations by Stand Up To Cancer (SU2C), the app also includes questions for cancer patients and survivors, such as if they are living with cancer, what type of cancer and what treatment they are receiving.

If you would like to help out in this difficult time, then you can. Download the app and share daily your own status, even if you are well. With your help we can understand much better the situation across the nation, how the disease presents itself to different people, and how it progresses.

This is a new virus which the world has never seen before. There are a wide range of symptoms, which differ between people. With your help we can understand better how the disease presents itself depending upon individual factors such as health and age.

No information you share will be used for commercial purposes.

There are two parts to the app:

You will be asked to share some general information, such as your age and some health details, such as whether you have certain diseases.

We will ask you every day to let us know how you feel, so you can share your symptoms. We will also ask whether you have visited the hospital, what treatment you received there, and whether you have been tested for COVID-19 (Coronavirus).

What’s New

Version 1.10

Support US Spanish
Add hayfever, atopy, and vitamin supplement questions,
Make Isolation frequency questions optional, and appear weekly
Fix yesterday/today issues with last updated profile dates
Add offline and server-outage error handling
Overhaul Covid tests screen to support multiple tests
Update thank you / confirmation screen

Ratings and Reviews

4.8 out of 5
17.3K Ratings

17.3K Ratings

ChristenNotForgotten ,

Please Download and Contribute

I think many are able to understand physical ways to give back that assist the medical sciences. We applaud those who donate plasma, organs, bone marrow, and blood. We may even understand the concept of being in a drug trial or donating our antibodies for research.

However, my own personal experience trying to share this app with my community is that they did not have the same level of competency and preparedness to understand the value of social inquiry to the medical field. Some folks I asked to participate responded with fear the app could record their personal lives or track their whereabouts. Advocating for use of this app was an eye opening experience for me as someone with a graduate degree from a social research institution of how far we need to go in bringing the public into competency with social research methods.

I would not have downloaded this app and would not be participating if the researchers were not vetted, the methods were unsound, or the institutions were not reputable. If that means anything to anyone, I hope it encourages you to please voluntarily participate with the scientific community to help figure this virus out faster than it figures us out. Thank you to those donating their time and symptom feedback for this important work.

tsubaki84 ,

Great Research Tool

From an end user perspective, this app is a great tool for researchers. It gives them the ability to safely collect data from huge pool of participants, geographically. It does have its limitations where certain demographics of potential participants are concerned. Some of those limitations are offset, hopefully, by giving participants the ability to report for additional multiple people under individual profiles, though I wonder exactly how effective it may be in reaching those who are living in poverty and/or living in rural areas with little to no Internet access.
Anyway, the app is extremely easy to use. Set up and daily use for end users is simple and fast, and I’m personally grateful for the daily push reminders. The only thing I’m confused about is, I thought I read somewhere that it would ask questions about the participants’ nutrition, diet, and exercise, but it did not prompt me to supply that information and I have not seen any place where I could provide it. Overall though, I think this is a great app with a great purpose. Thank you!

Diamond*Girl ,

A worthy research effort, but missing a few things

First, I’m glad there is an app developed for tracking & research of COVID-19. It was simple to set up an account & allowed me to also add a profile for my 90 year old mother. I found the process easy to log in daily with my symptoms (feeling well thankfully at this point). I DO recommend people sign up as it could be helpful in understanding more about the disease & how it spreads. However, they are missing some questions/info that I feel should be asked & included: 1) It should be tracking your potential exposure by monitoring what you’ve been doing/ where you’ve been (I.e., at home, getting outside/exercising, shopping, visiting friends/family, going to work, social distancing or gathering in groups, etc), 2) include symptoms such as lower grade fever and loss of taste & smell 2) asking more specifically when/where you traveled 3)city/county where you live 4) whether you’ve been wearing mask while shopping/going out in public 5) if you do suspect you have COVID-19, have you consulted with a doctor or self-quarantined. Overall, it’s simple & may provide some useful data and worth participating.


Zoe Global Limited
92 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Infrequent/Mild Medical/Treatment Information


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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