Supporting Meal Management in Type 1 Diabetes

Inclusion Criteria: * Written informed consent * Adults (aged 18 years or older) * Type 1 diabetes (as defined by World Health Organization (WHO) for at least 12 month) * Current use of a commercial hybrid closed-loop system * HbA1c≤12% (measured within the past 3 months) * Willing to use the SNAQ app on a daily basis for over 3 weeks * The participant is willing to follow study specific instructions and share their treatment data with the study team Exclusion Criteria: * Any physical or psychological disease or condition likely to interfere with the normal conduct of the study and interpretation of the study results * Previous use of SNAQ app for more than 5 days within the past 3 months * Self-reported pregnancy, planed pregnancy within next 3 months or breast-feeding * Severe visual impairment * Severe hearing impairment * Lack of reliable telephone facility for contact * Concomitant participation in another trial that interferes with the normal conduct of the study and interpretation of the study results * Participant not proficient in German