Strategies to improve adherence to interventions {11c}
completed/used
Participants will be told that the apps are most effective when consistently used several times during the study. Additionally, both apps send push-up notifications reminding participants to complete certain exercises (i.e., challenges and tools) in the app. The use of the apps will be monitored including the number of times the app is used, and the number of times single challenges and tools have been completed/used in the app. A minimum intervention dose for the intervention conditions will be defined a priori, based on the rationale that active ingredients of the treatments are learning new concepts (completing 