1.YOU DONT NEED TO DOWNLOAD APP! 2.My mom was feeling sick so did 1 of these rapid tests our lovely Govt gave out, came up negative. Thought she might have flu so 2DAYS Later went to walk in for FLU And C19virus test, POSITIVE Omicron, no flu. Nurse says "she probably took rapid 2soon", SO mom gets home takes another test, STILL SAID negative! BUT Test worked for dad. OH! Best part? There Made in Country that GAVE us the virus! Now where buying THERE tests..That are inconsistent.Go figure.