The box and instructions differ as to which app should be downloaded on your phone. The app has a very difficult time finding a "sticker" as the tracker is labeled. And after a very short amount of time in use, the sticker beeps when moved and the app has a hard time finding the sticker even when the sticker is only inches from the phone. Isn't the purpose of the app to find the sticker? And the sticker only works after being shaken? And if the sticker is lost, then how can you find it to shake it to wake it up so the app can find it...if it can find it at all. Very close to hating this product. The only reason I don't hate it...I was able to make it work once. Only once though. Hopefully when I need it, it will work.