Mobile Apps for the Management of Gastrointestinal Diseases: Systematic Search and Evaluation Within App Stores

Eva-Maria Messner   ¹ , PhD ;   Niklas Sturm   ² , MD ;   Yannik Terhorst   ^{1, 3} , MSc ;   Lasse B Sander   ⁴ , PhD ;   Dana Schultchen   ⁵ , PhD ;   Alexandra Portenhauser   ¹ , BSc ;   Simone Schmidbaur   ² , MD ;   Michael Stach   ⁶ , MSc ;   Jochen Klaus   ² , MBA, MD, PD ;   Harald Baumeister   ¹ , PhD, Prof Dr ;   Benjamin M Walter   ² , MD, Prof Dr

¹ Department of Clinical Psychology and Psychotherapy, Institute of Psychology and Education, University of Ulm, Ulm, Germany

² Department of Internal Medicine I, University Hospital Ulm, Ulm, Germany

³ Department of Research Methods, Institute of Psychology and Education, University of Ulm, Ulm, Germany

⁴ Department of Rehabilitation Psychology and Psychotherapy, Institute of Psychology, Albert-Ludwigs-University Freiburg, Freiburg at Breisgau, Germany

⁵ Department of Clinical and Health Psychology, Institute of Psychology and Education, University of Ulm, Ulm, Germany

⁶ Institute of Databases and Information Systems, University of Ulm, Ulm, Germany