The research app participants actually keep.
Free native iOS and Android apps built for answering in the moment — anonymized sign-in, notifications that follow each participant’s local clock, and surveys that work with no signal at all.
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Everything participants need, nothing they don’t
High completion rates come from an app that stays out of the way. Every feature below exists to make answering in the moment effortless.
Free native apps
Real iOS and Android apps — not a web wrapper — freely available on the App Store and Google Play.
Anonymized sign-in
Participants log in securely through the app without sharing identifying information with researchers.
Smart notifications
Prompts fire at the right local time, and schedules re-anchor automatically when a participant changes time zone mid-study.
Offline capture
Surveys open and save with no cellular or WiFi connection, then upload once the participant reconnects — built for fieldwork.
Multimedia answers
Text, photo, voice, and video responses. Voice and video reach the research team automatically transcribed.
In-app compensation
Amazon e-gift cards arrive directly in the app, scaled to response rate, with no identifying details collected.
From download to first answer in minutes
No lab visit, no account set up in advance, and no identifying information shared with the research team.
Download the free app
Participants install ExpiWell from the App Store or Google Play — no cost, no in-app purchases, and no account needed in advance.
Join with a code or an invite
Enter the study’s access code, accept an email invite, or use a project-scoped temporary account for fully anonymous collection.
Answer in the moment
Notifications arrive on the study’s schedule. Participants answer where the experience is happening, and can watch their own responses build up in mobile charts.
Clear about what researchers see
Participants deserve a straight answer, and IRB reviewers ask for one. This is the page a study can point either of them to.
Researchers see
- Survey answers, linked by an anonymous identifier
- Response timestamps and completion rates
- Media and location data — only when the study asks for it and the participant grants permission
Researchers never see
- Names, email addresses, or account credentials
- Anything on the phone from outside the study
- Location or sensor data without an explicit opt-in
The participant apps ship in 13 languages, and surveys can be written in virtually any language.
What participants ask before they start
Yes. The participant app is free on both the App Store and Google Play, with no in-app purchases. Studies are funded by the researchers who run them, never by participants.
The app is built around short, scheduled check-ins rather than continuous background tracking. Offline capture means a survey can be opened and answered with no data connection at all, and uploads once you reconnect.
Answers are linked to an anonymous identifier and delivered only to that study’s research team, on infrastructure whose HIPAA and GDPR controls are monitored continuously. The Trust Center has the details.
Yes, at any time, from inside the app. Leaving stops all notifications and any further data collection for that study.
Elevate your research
Join over 7,000 researchers around the world and give participants an app they will actually answer.