▶▶▶▶▶▶▶▶▶▶ PLEASE NOTE THE FOLLOWING INFORMATION ◀◀◀◀◀◀◀◀◀◀◀◀◀◀ The Gratitude-App will be tested for its effectiveness as part of a scientific study at Leuphana University Lüneburg and the Tabor University of Applied Sciences Marburg. It is offered free of charge. To use the app you need a code / a personal client ID. All study participants will receive these access data. If you would like to take part in the study, please visit our website and register there: https://www.geton-training.de/dan