“Hack4Vilnius” hackathon is dedicated to promote innovations for the city of Vilnius. “Hack4Vilnius” took place during the weekend of October 19-21, 2018. The three-day event aimed at promoting innovation in the capital city and was organized to find ideas and solutions on how to make Vilnius a healthier, cleaner, smarter and more mobile city. Over 100 participants, among which programmers, designers, business developers, students from different fields, gathered in the Sunrise Valley campus. Nearly 30 experts and representatives of city organizations were helping the teams to develop their chosen solutions. During the hackathon, participants had the opportunity to consult and work together with mentors from prominent business and public companies, including successful start-ups, business support organisations, and corporate lawyers. The winners of Hack4Vilnius were selected out of 17 competing teams. The main prize of 1000 Eur was awarded to the team „Reality Check“. The team developed a prototype of „GetPet“ app, dedicated to promoting long term and short term pet care.