How to take long exposure video

Est wrote 09/30/2015 at 04:54 1 point

i made a Pov fan and I am trying to take a video of it with my mobile phone to publish the project here. My problem is that the frame rate of the video recording is too fast compared to my Pov and doesn't look OK in the video. I am looking for a free Android app that allow me to change the frame rate or the exposure time. Any suggestions?