No, no, no!!! Run, don't walk, away from this app & test kit! I've used several different at home kits, and this is by far the worst. From the poorly written directions (possibly written by someone for whom English is a 4th or 5th language), to the testing solution vial that is wider than the tube you are expected to squirt it into, this test kit is the worst. If they did such a poor job of developing the mechanics of this kit, can we really trust the science behind this test kit? Just say NO!