To determine the accuracy and precision of capillary refill time measurement using a mobile health application (Cap App) in a healthy pediatric population. This will be a cross-sectional study measuring the capillary refill time in a healthy pediatric population using both the Cap App and two additional manual methods which will serve as the comparison.

Inclusion Criteria:

• Healthy children aged 1 month to 17 years

Exclusion Criteria:

• Fever or hypothermia
• Chronic illness including cardiovascular or renal disease
• Severe injury or blood loss
• Dehydration
• Raynaud's phenomenon

Healthy children age 1 month to 17 years

There are no plans on sharing results of the individual participant study data or aggregate study data with the participants. The data will be kept blinded from the research team members at the time of collection and, thus, no information will be shared with the participants.

Data on adverse events was not collected