Varo is a mobile app that enables Android phone users to collect and transmit the performance data that is recorded and stored by 30-day temperature and alarm recording (30DTR) devices that are currently widely deployed in the vaccine cold chain. Users can also create a manual performance report if a 30DTR is not available at the facility.

Healthcare workers who have access to mobile phones can now build a bridge between their facilities and the regional and national locations where the data can be monitored for maintenance and performance.