I have my wife bought this part because they often times misplaced her key and we must always look for. After some research I found out that there is an app for not only for Windows Phone, but also for Android. After a few weeks use, I can now say that the part of my wife's actually useless: The Android app is vs. the functions ago. the Windows Phone version apparently strong eingschränkt. I have, for example, found no way past the place where the day has been localized to display on a map. That leaves the ability of the app that you will be informed (by vibration or beep of the phone) when the tag goes out of range. That is, if you are traveling quite useful. At home however, it is annoying, because we do not carry around all the time with us and then accordingly often a "false alarm" created our keys when the phone something too far away from the vault of the key. The alarm can indeed manually disable the app, but then you have to also remember good time to re-enable it, otherwise one day benefit the Treasure pure nothing.
Furthermore, the battery runtime of the tag is not particularly. The included coin cell battery was empty after 4-5 weeks with us. Environmental Technically not exactly optimal.
I would not buy the part again, luckily it was not too expensive.
