TestCard is a smartphone app that can read a variety of diagnostic tests quickly, easily, and from a user’s home via their camera phone. Originally developed to diagnose UTIs, TestCard’s app can be repurposed to help read COVID tests from home. A user does a finger-prick blood test (provided by companies like SureScreen Diagnostics) and the TestCard app can let the user know if they have tested positive for COVID within minutes (results can also be shared back with public health bodies if required).