Create an account

Taking part in a study runs through the free ExpiWell app: install it from the App Store or Google Play, then join your project — no payment and no technical setup needed.

Joining your study

Your research team will give you one of three ways in:

1. An access code — enter it in the app to start the project.
2. An email invite — join with the email address the researchers invited.
3. A ready-made account — some studies hand you temporary login credentials instead, so you never have to create an account yourself.

What to expect

• Surveys arrive as notifications on the schedule your research team set — times follow your own time zone and adjust automatically if you travel during the study.
• No connection? No problem. You can respond without WiFi or cellular service; answers upload automatically once you're back online.
• Depending on the study, responses can include text, photos, voice, or video, and some projects show you charts of your own progress in the app.
• If your study compensates participants, payments arrive directly in the app as Amazon e-gift cards — see Receiving payments.

Your privacy

You participate anonymized: no identifying information is shared with researchers through the app. The platform is third-party verified HIPAA and GDPR compliant.

Troubleshooting

The app is available in English, German, Spanish, Simplified and Traditional Chinese, Hebrew, and Korean. If you can't join a project, double-check the access code with your research team — or contact them directly from the app; see Contacting the researchers.