Yes. The study participants will be randomly assigned (like flipping a coin) to one of two groups at the end of the first telephone interview: The "treatment group" receives direct access to the My7steps App programme. The "control group" remains on a waiting list for three months. The rest of the treatment is the same for both groups. The random allocation ensures comparability between the groups. The probability of being assigned to one of the two groups is equal. At the end of the study, the control group will also receive two months of free access to My7steps App. During the study, the treatment group and the control group are compared. The investigators do not know which group you belong to, but you do. This is called "blinding". Blinding the investigators is necessary to get the most unbiased results possible. Please do not tell the examiners which group you are in!