Hi there, I using safesky for some time and recently tried to utilize and quite new lenovo legend tablet. Unfortunately it comes w/o internal GPS receiver. SkyDomon works just fine using an Bluetooth GPS device and a connector app. However, safesky is not installable due to the app requirements. My feature request is to drop the requirement for an internal GPS. The connector apps mock an internal device using the data from the Bluetooth GPS receiver, which BTW gives more precise position data than most internal GPS receivers. It’s just a deleted line in the app manifest and may be a warning in the legal notice to not use arbitrary GPS mocks 
Regards, Stefan