U-WIN is world’s largest Electronic Immunization Registry for registering Pregnant woman and children and further establishing digital tracking mechanism for vaccination status to reach and reduce zero dose children. U-WIN, the programme to digitize India's Universal Immunization Programme (UIP), is being implemented by Ministry of Health & Family Welfare, Govt of India and will be used to register and vaccinate every pregnant woman, record her delivery outcome, register every newborn delivery, administer birth doses and all vaccination events thereafter. The UWIN citizen app can be used by the citizens to register their Pregnant women and children, eligible beneficiaries of UIP. They can search for the nearest vaccination centers using the search options for District, sub district and pin code of their area, book appointment and get digital certificate of vaccination for their wards. Using this app the citizens can also create ABHA for any registered beneficiary. They can also know the next vaccination date for their wards. In case of any issues faced, they can also raise grievance through the app.