Hi, I was searching to post this, since I don't have the necessary expertise to fully check myself but if you have some time and curiosity check out the Mi Fit app ( https://play.google.com/store/apps/details?id=com.xiaomi.hm.health&hl=en ), I consider it even a greater threat to privacy than these 2, since it gather ALSO your health data from the xiaomi mi band 2. If you'd be interested to check, i would be even willing to buy you one, it's only 15dol