Inclusion Criteria:  informed consent smartphone with access to WhatsApp indication for ambulatory colonoscopy ASA I or II  Exclusion Criteria:  no informed consent given or possible no access to a smartphone with WhatsApp <18 years old Pregnancy/Lactation Allergy to Moviprep© ASA (American Society of Anesthesiologists) state >II extended abdominal surgery in past history no indication for ambulatory colonoscopy