Hi Cesar,
Thanks for your interest in Pix4D software solutions. I’m sorry to hear that you have not been getting good sharp images from your Phantom 4 Professional drone and Pix4D capture on Android platform. There was an in-depth discussion regarding blurry images in the following support post titled DJI P4 Pro and Focus/Camera Settings that may be helpful. The typical cause of Blurry Images is that the image is captured during forward flight with a slow shutter speed. This can be counteracted by using a faster shutter speed and flying with good lighting conditions. Images can also be Blurry due to poor camera Focus. The DJI P4P can have the focus adjusted within DJI GO application prior to using Pix4Dcapture.
If you would like to take images based on Distance rather than Time, you could also experiment with using the Free Flight option in Capture and you can specify the distance between image captures.
I hope these suggestions are helpful,
Regards,
Aaron.