Inclusion Criteria:  One parent who 1. lives in a household with at least one child aged between 6 and 14 years 2. eats a family meal (shared meal) with this child at least 5 days/week 3. owns an Android smartphone 4. has mobile internet on the smartphone 5. uses the smartphone on a daily basis 6. uses the smartphone at least sometimes during shared meals 5. agrees on participating in the study.  Exclusion Criteria:  Insufficient knowledge of German of the participating family member Involvement of the participating family member and/or child in a dietary program to reduce weight or plan to do so for the duration of the study. Holidays during the intervention period