Yes, if you have the current app version it should work. We do not recommend it though.
Launch with the DJI app and go up to altitude keeping the drone in view. The controller should stay connected when you close the DJI app and then open the DD app as the drone hovers. Sometimes it may be necessary to unplug the USB cable from the mobile device and plug it back in to connect the drone between apps. You should hopefully then have enough GPS signal to go through the checklist and fly.
I have also found in wooded areas that first turning on the DJI GO app and letting it get signals on the ground, then going to the DD app on the ground helps connect the GPS. You might try that.