
D4L Collect
Your contribution to research
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Free
About
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.
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!
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What's New in D4L Collect
4.12.1
July 22, 2026
This update brings the following improvements and new features: - Bluetooth permissions from participants are now only requested for studies that use sensor devices connecting using Bluetooth - The summary screen for questionnaires is now skipped for questionnaires that have only one question - Several bug fixes - Various accessibility improvements
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