Every screen participants see
- Onboarding screens and consent flow
- Navigation tabs and the home screen
- Pages built from blocks: questionnaires, EMAs, content, device status, personal stats and intervention cards
- Study name and branding
Your study’s own Participant App, designed without code.
One native iOS and Android app runs every study. Each study gets its own experience, designed by the people who wrote the protocol. Try it: drag a block onto the phone.
Blocks
Drag a block onto the phone, or tap it to add.
Participant preview
Move More StudyDay 12 of 28
HomeTasksLearnMe
Rule Under 200 steps by 14:00 → send a Movement Nudge
Four questions
What researchers ask first.
Exactly your preview
- The canvas preview matches the app on iOS and Android
- The app works offline and syncs safely later
- Participants join with a one-time code, with no password to remember
- Changes reach participants without an app store release
Blocks read data, rules decide
- Blocks show the study’s own data, such as today’s steps from Garmin
- JITAI rules decide when a nudge, questionnaire, EMA or content card appears
- Every view and response is logged for analysis
How participants actually use it
- The time spent on each page of an intervention
- How much of each video participants watch
- How long each questionnaire takes
- Use these engagement analytics to measure intervention dose and adherence. Available as an add-on
Why it matters
No app team. No release cycle.
A custom study app usually means months of development and a fixed layout once it ships. With the App Designer, the research team changes the app between study waves, the same day.
See how rules drive the app →
Start from a template
Ready layouts
Start from a proven app layout and adapt it to your protocol. Templates are available on higher plans.
Compare plans →