Welcome to the ODK forum, @Mor_Gueye! We're glad you're here. When you get a chance, please introduce yourself on this forum thread. Thanks for adding your profile picture. It helps build community! Questions about how to do something in the app should be posted to #support and not #community.
When calculating durations there are several options:
- You can use metadata to capture
start
andend
and then calculate the total length in your data processing. Note that if the form is saved and the reopened for review before submission, this will change theend
time. - You can use lightweight timestamping.
- You can use a form audit log.