This prospective cohort study aims to estimate the effect of the CloudCare application in daily practice on treatment satisfaction and emotional burden for pediatric patients and their parents/caregivers, patients' glycemic control (glucometrics), healthcare professional satisfaction, and the impact on costs.

A total of 600 pediatric patients (1-15 years) with type 1 diabetes will be enrolled into the study.

This is a multi center prospective cohort study in Europe with pre- and post-measurements in type 1 diabetes with 12 months follow-up. This study will only include pediatric patients for which CloudCare is part of their (new) standard care of type 1 diabetes. Participants will be enrolled in several hospitals/healthcare organisations in Europe. Participant's data will be retrieved from their medical records and from uploaded data of their medical devices used for their type 1 diabetes treatment.

The study will consist of two periods. A 3 months' retrospective period in which data will be retrieved from patients' dossier followed by a 12 months' prospective period after introduction of CloudCare as part of patients' standard care by the treating physician.

The 3 months' retrospective period is the control period for the prospective period.

Inclusion Criteria:

• Parents/caregivers and, depending on local laws and regulations, also the patient are willing to sign the study informed consent form prior to any data collection for this study
• Clinical diagnosis, based on investigator assessment, of type 1 diabetes and using insulin with or without metformin for at least 6 months.
• Age between 1 and 15 years old.
• Use of multiple daily injections of insulin (MDI, with a basal insulin injection and bolus injections) or continuous subcutaneous insulin infusion (CSII) with Flash or Continuous Glucose Monitoring (FGM/CGM), but without CloudCare for at least three months.
• Receiving CloudCare as part of their standard care for at least 6 months.

Exclusion Criteria:

• Patients with type 1 diabetes on glucose lowering treatments other than insulin with or without metformin.
• Any known factor, condition, or disease that might interfere with study conduct or interpretation of the results, as deemed by the investigator.

Pediatric patients with type 1 diabetes (1-15 years). All participants must be treated with multiple daily injections of insulin (MDI) or continuous subcutaneous insulin infusion (CSII) with continuous or flash glucose monitoring (CGM/FGM) for at least three months without CloudCare and will get CloudCare as part of their standard care.