Inclusion Criteria:  Informed consent has been signed 18 years or older Resident in the USA or Denmark AD meeting the UK Diagnostic Criteria for Atopic Dermatitis At least one visible AD lesion at the time of recruitment (as confirmed remotely through photo upload in screening) Smartphone user with daily access to internet (WIFI or 3G/4G) Willing to donate a DNA sample Confirmed intention to comply with study protocol procedures  Exclusion Criteria:  Female subjects that are pregnant (or plan to become so during the study period) or lactating Active dermatological condition that may confound the diagnosis of AD and/or the assessment of disease activity Unable to speak or understand English or Danish Overlap with participation in interventional trials No visible AD at time of screening Any other reasons that in the investigator's opinion could: Impede a subject's ability to complete the study period Influence the objectivity or quality of the findings of the study