when it did work, it showed my child 1-2 blocks away from where child actually was. making me call to verify with school/etc that child was theed and not where the app said they were. most of the time, app did not detect child's device (even when side by side & both streaming with 4g), would not let me unpair to repair with child's device. out of vexation, had to uninstall and note pay again for reinstallation. if doesn't work again, complete waste of money.
Little Nanny at Google Play market analyse