I have a Phantom 4 Pro+ that has a monitor mounted to the controller.  Is it possible to download Pix4d with the latest version?  I've used APKPure; however the it downloads a 2018 version 4.5 and does not have the bug fixes for the basemaps issues that were later determined and fixed in late 2019.  Any ideas?

The + model is a closed ecosystem and doesn't allow for installing other apps.
To run Pix4D or other apps, you'd need to buy a regular controller  to use with a phone or tablet for your drone.

Hello there timowilso. Thank you for reaching out and for these information you have given. As stated above, I am sorry to say that the DJI Phantom 4 Pro + does not allow installing other 3rd party applications. Thank you.