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About this app

Advance health research – easily and directly from your smartphone.
With the D4L Collect app, you can participate in digital studies anytime, anywhere.

Why join digital research studies?
- Take part in studies from anywhere with your smartphone or Wear OS smartwatch.
- No need to visit hospitals or clinics.
- Effortlessly collect health data in daily life.
- Enable evidence-based research by combining Patient-Reported Outcomes (PROs) with real-world data from wearables.
- Help researchers gain insights faster.

Also available for Wear OS.
A companion Wear OS app allows participants to record health data directly from their smartwatch as part of selected studies.

Your data is secure.
All information in the D4L Collect app is end-to-end encrypted and securely transmitted.

About Data4Life
Data4Life is a nonprofit digital health organization funded by the Hasso Plattner Foundation. We envision a world where health data is ready for research in the areas of public health and personalized medicine to improve prevention, diagnosis, and treatment.

Questions or feedback?
Contact us at we@data4life.help – we’re happy to assist!
Participate in digital studies and contribute to health research
Updated on
Sep 23, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Personal info, Health and fitness and 3 others
  • This app may collect these data types
    Personal info, Health and fitness and 3 others
  • Data is encrypted in transit

What’s new

This update brings the following improvements and new features:
- Fixed an issue causing connection problems when fetching study updates for some users
- Added a banner that shows when notification or alarm permissions are missing
- Added support for SpO2 (blood oxygen) data via Health Connect
- Reduced the number of low battery notifications
- Accessibility improvements