This worked well with the Covid self test that are available at Kroger. It walks you thru the process, gives you step by step instructions and it even has a stop watch built it to properly time you, then it instructs you on what to do next. When you've completed the steps it asks that you take a picture of the results and send it in thru the app and within a few mins it gives you a positive or negative reading. It was simple, quick and easy. It doesn't get much better than that.