# ZOE Health Study — Global health issues

> Citizen science app for health research and disease prevention. (iPhone/iPad app by Zoe Limited.)

- Source: https://appshunter.io/ios/app/zoe-health-study/id1503529611 (this page in markdown: same URL + `.md`)
- Developer: [Zoe Limited](https://appshunter.io/developer/1468130856)
- Category: Medical, Health & Fitness
- Price: Free
- Rating: 4.84/5 from 18,700 App Store ratings · 172 written reviews indexed
- Age rating: 12+
- Requires: iOS 10.0 · 44 MB
- Languages: English
- Released: 2020-03-26
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/zoe-health-study/id1503529611/reviews.md

## What is ZOE Health Study?

Help critical research into major health conditions by reporting how you feel each day in the app, even if you feel well.

Join over 800,000 people in supporting scientists to help our national health services fight the biggest health issues of our generation. Millions joined ZOE to fight COVID-19 with their mobile phones from home. Why stop there?

The ZOE Health Study is an evolution of the ZOE COVID Study, which has data quoted in thousands of news stories and published in dozens of scientific papers. We’ve already proven that our approach can rapidly advance scientific understanding and public knowledge.

With our technology and dedicated Contributors, our research will look at how altering your day-to-day behaviour could impact your immune system and reduce the risk of developing major diseases from cancer to dementia. You will be directly helping us to develop an early warning system for disease detection which will help to save lives.

This app (formerly known as the ZOE COVID Study) allows you to help others but does not give health advice. If you need health advice please visit the NHS website.

DATA

The data that you give us for our research into diseases other than COVID-19 will be restricted to King’s College London and ZOE only unless you opt-in to share it more widely in the future.

Your data is protected under GDPR, and can only be used for the purpose that you consent to.

We’ll never sell your data and we’ll be transparent about developments we make to products that advance human health. Please read our privacy policy for more information.

HEALTH INFORMATION

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

DAILY SYMPTOM TRACKING

We will ask you to set up your ‘Usual Self’, this is your personal health baseline and will indicate any symptoms you may frequently suffer from. By telling us how you feel each day and reporting any changes in your usual symptoms, we will be able to relay valuable data to scientists.

ADDITIONAL RESEARCH STUDIES 

We’ll conduct voluntary participant studies to see how lifestyle changes might work for you as individuals. We’ll play back insights from the studies to the community that will enable you to live your healthiest life and reduce your risk of developing major diseases.

In-depth studies into issues such as menopause and cancer will uncover detailed new findings to advance our understanding of major conditions and diseases. This app is designed and built by ZOE Global Limited, a health science start-up, in partnership with doctors and scientists at King's College London.

## Key features

- Daily symptom tracking
- Contribute to health research
- Disease early warning system
- Personal health baseline setup
- Voluntary participant studies
- Data privacy and transparency

## What do users think of ZOE Health Study?

Overall sentiment: positive

**Pros**

- 👍 Easy to use
- 🚀 Simple and fast to report daily
- 💡 Valuable research effort
- 🤝 Opportunity to contribute to the greater good

**Cons**

- 🐛 Bugs with account creation and login
- 🔍 Lack of detailed symptom tracking
- 🤔 Unclear how data is being used
- 📊 Difficulty accessing personal reporting history

**Commonly reported bugs**

- Daily reporting not recording properly
- Inability to switch between user profiles
- App freezing or crashing during use

**Most requested features**

- Add more detailed symptom options
- Allow users to report potential COVID-19 exposure
- Provide feedback on local case trends
- Enable users to view and edit past reports

## Recent user reviews (10 of 172)

All indexed reviews: https://appshunter.io/ios/app/zoe-health-study/id1503529611/reviews.md

### 5/5 — Excellent App

*2025-05-27, version 5.1.0*

This is a well-designed, intuitive app.

### 5/5 — Useful

*2025-05-25, version 5.1.0*

Mostly intuitive and easy to use.. a few little idiosyncrasies but nothing to worry about. Much better since the ability to edit your profile, cos that can change in a medical sense.

### 5/5 — Keeping track

*2025-05-23, version 5.1.0*

I love that I have been able to keep track of all my testing and vaccines in one place.

### 5/5 — A good App!

*2025-04-23, version 5.1.0*

We have been using this app since it was first released, and find it to be easy to use. We hope that the data is valuable to researchers and policy makers.

### 1/5 — Crashes

*2024-12-15, version 5.1.0*

I can't get past the screen where I add my email. I've deleted the app, restarted my phone, and downloaded it again. Crashes at the same point. When I open it again, it fills the screen with, 'Take 1 minute each day ...' every time. With no option to join, next or any other way to get rid of this screen other than closing the app. I'd like to participate.

### 4/5 — Mr

*2024-12-03, version 5.1.0*

Very good App

### 4/5 — Easy to use

*2024-11-13, version 5.1.0*

Daily update takes only a few seconds and good to know I’m helping to track national symptom trends that may spot future local and national outbreaks of disease

### 5/5 — Pivotal moment in human health

*2024-11-07, version 5.1.0*

The Zoe ideas and information behind this app are of profound importance to our understanding of our health. The app provides very useful guidance to help us make the right choices when buying or consuming food.

### 3/5 — Cant log in

*2024-10-09, version 5.1.0*

No option to reset password very frustrating

### 3/5 — Used to be more user friendly- changed for the worse

*2024-10-04, version 5.1.0*

I’m very disappointed that the app changed from the very simple original interface, to now comparing against your normal symptoms. It makes it far more confusing to use, which meant I had a gap of 242 days since my last login, but that’s why I never logged.

## Frequently asked questions about ZOE Health Study

### What does the ZOE Health Study app do?

The app allows users to contribute to critical health research by reporting their daily well-being, even if they feel well. This data helps scientists understand major health conditions, develop early warning systems for disease detection, and explore how lifestyle changes impact the immune system and disease risk.

### What are the key features of the ZOE Health Study app?

Key features include daily symptom tracking, the ability to contribute to scientific research, setting up a personal health baseline ('Usual Self'), and participating in voluntary studies on lifestyle changes. The app also focuses on data privacy and transparency.

### Is the ZOE Health Study app free to use?

Yes, the ZOE Health Study app is free to download and use. The description does not mention any in-app purchases, subscriptions, or advertisements, indicating it is a free service for participants.

### Who is the ZOE Health Study app for?

This app is designed for individuals who want to actively contribute to scientific research on major health conditions and disease prevention. It's for those interested in helping advance our understanding of health and potentially saving lives through data contribution.

### How is my data protected in the ZOE Health Study app?

Your data is protected under GDPR and will only be used for the research purposes you consent to. Data for diseases other than COVID-19 is restricted to King's College London and ZOE unless you opt-in to share it more widely. Your data will never be sold.

## Version history (last 5 releases)

### 5.1.0 — 2023-09-29

Minor tweaks and fixes for ZOE's Ferment Experiment

### 5.0.4 — 2023-08-28

Bug fixes

### 5.0.3 — 2023-08-03

Minor tweaks and changes to improve performance

### 5.0.2 — 2023-06-01

Minor bugfixes

### 5.0.1 — 2023-05-30

Minor performance improvements

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## More apps by Zoe Limited

- [ZOE Health: AI Meal Tracker](https://appshunter.io/ios/app/zoe-health-ai-meal-tracker/id1471632228)
- [AskZOE: Food Scanner](https://appshunter.io/ios/app/askzoe-food-scanner/id6470290129)

All apps by Zoe Limited: https://appshunter.io/developer/1468130856

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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.*