On the first of April, 13 students from the three-week IDEA applied epidemiology course took to the Villejean University of Rennes campus under sunny skies with smartphones and tablets to conduct a survey on the use of e-cigarettes by students. Fifteen other students used traditional paper forms to collect responses. The day preceding the survey, Curtis Broderick, specialist in mobile data collection at EpiConcept worked with the coordinators of the IDEA training programme to transcribe the questionnaire into EpiConcept’s Wepi web application and then conducted a short training session on using ODK Collect on Android telephones and tablets for the students. On the day of the survey, within 5 hours, 1500 students had responded to the survey. Dr. Pascal Crépey, one of the coordinators of the IDEA training programme noted, “Wepi and its compatibility with ODK Collect are owed the success for this survey.” Held annually at the EHESP French School of Public Health, the IDEA programme is celebrating its 30th year with this year’s survey being the largest in the history of the training.