Fig. 3

Screen shots of mobile application. a The main screen, showing the couple’s process for the particular month. The icons on top illustrate the categories of the different challenges selected (two physical activity challenges and one healthy eating challenge). In the middle, is the progress bar, showing the progress of the user and her spouse for this particular month. Lowest, are the selected challenges listed and how many times they should be performed in one week. b By tapping on the challenges, a description of the different challenge is showing (example of the healthy eating challenge). c When the challenge has been performed, the subject will ‘check-in’, and by doing that be awarded 2 points for performing the challenges. d A timer can be set for each challenge, so a reminder will be send to the subject on the given time to perform the challenge. e The subject is selecting the challenge out of a list set challenges. f The Flash challenge is a bonus challenge, which the subject can select when it becomes available. This occurs randomly during the intervention period. The Flash challenge will give extra points