We received the item finder to review a couple of weeks ago. Even though it said on the package that it was only compatible with iPhones, the app was recently made available in the Google Play Store, and the KiiTag does, in fact, work on my Samsung GalaxyS4.
When I set up the App on my phone, my daughter and I played a couple of games of hide-and-seek with my keys. The signal got stronger as we were closer to the keys, but it was still not very easy to locate the precise position of them. I would prefer something with noise like a metal detector when I get close to the object, that it would buzz or beep really loud. Even a flashing light on the fob would improve it greatly.
The app features an alarm that will go off(can be disabled) if the item goes out of range from your phone. It will show you the last place your item was seen- again, not down to the nitty gritty spot, but you can see if your item was last seen at home, or at your local coffee shop. You can assign up to 10 items with their own KiiTags on one phone. You might be out of luck if you lose your phone, though.
If you lose an item, you can report it missing, and others in your community can help you look for it(assuming they have the app. Unless you report your item missing, no one will have access to your KiiTag. Once you register your KiiTag, it will only be able to be used by you.
There are other add-ons like a camera remote($3.99), auto message sender($4.99), and phone finder(99 cents). These are all purchased through the KiiTAG shop within the app. KiiTAG can be purchased for $19.99 a piece on the LifenSoul website.