Long-Term Usage of Breeze, a Gamified Breathing Training App, and Its Effect on Momentary Relaxation in People With Cancer: Cohort Study

Anja Yvonne Bischof   ^{1 *} , PhD ;   Tobias Budig   ^{2, 3 *} , BSc ;   Sonja Schläpfer   ⁴ , PhD ;   Yanick Xavier Lukic   ^{1, 5, 6} , PhD ;   Fabian Schneider   ⁷ , BSc ;   Prabhakaran Santhanam   ⁸ , MSc ;   Jürgen Barth   ⁴ , PhD ;   Claudia M Witt   ⁴ , Prof Dr Med, MBA ;   Tobias Kowatsch   ^{1, 2, 3} , Prof Dr

¹ School of Medicine, University of St. Gallen, St.Gallen, Switzerland

² Institute for Implementation Science in Health Care, University of Zurich, Zurich, Switzerland

³ Centre for Digital Health Interventions, Department of Management, Technology, and Economics, ETH Zurich, Zurich, Switzerland

⁴ Institute for Complementary and Integrative Medicine, University Hospital Zurich and University of Zurich, Zurich, Switzerland

⁵ School of Engineering, ZHAW Zurich University of Applied Sciences, Winterthur, Switzerland

⁶ Codeklang GmbH, Zurich, Switzerland

⁷ Byldr GmbH, Zurich, Switzerland

⁸ Datahouse AG, Zurich, Switzerland

*these authors contributed equally