This subject is explained in this thread Yuneec Pilot (Android) on Yuneec Website.
Jan 6, 2020 the app returned to Google Play, but was removed again before the end of the month. I assume Yuneec and Google cant come to terms.
In the same manner as the Breeze Cam app for Android users earlier this year the Yuneec Pilot app has been pulled from the Google Play Store and placed on the Yuneec website in the Downloads section https://www.yuneec.com/en_US/support/downloads/mantis-g-us.html.
Jan 6, 2020 I learned...