INSTALL_FAILED_UPDATE_INCOMPATIBLE when I try to install compiled .apk on device
Solution 1:
it means the application which you want to install is already installed. just remove the old one and try again.
Solution 2:
Try
adb uninstall package-name
It works for me. I have remove my app using Titanium Backup. However,I think Titanium backup didn't removed my app totally.