Quik editing software on android and IOS is the best automatic video editing software I've come across. It is perfect for people who love to shoot but hate to edit, like me. It is surprisingly fast and really does a good job in picking out the best of your footage. However, there are some issues with it that I've discovered after extensive use.
1) IOS memory management is abysmal. Recently I created a 3 minute 1080p video with Quik and Hero5 footage on my ipad. However, even after deleting the project from within Quik and deleting the video from Photos, I was showing 3 Gb less than what I had when I started. It was only after I uninstalled Quik that the 3 Gb of space returned to my ipad. The app apparently does not release memory properly on IOS.
2) Footage from older Hero cameras, such as my Hero2, shoot in .mov format. Android does not natively support .mov format footage. Quik on android will not recognize that footage. You will need to use Quik on ipad to use .mov footage.
3) If you use the gopro Capture app to download footage wirelessly from your Hero5 camera, be aware that it puts that footage into internal memory on your android device. There is no setting in the Capture app to download the footage onto your SD card, a huge shortcoming for me since I'm short on internal memory on my Samsung smartphone.
4) If you use Quik to create a video and then save the video, Quik will save the video to internal memory as you would expect. However, on android, if you delete the video project from within Quik, it will also delete the saved video. IOS will not do that, deleting the Quik project will not delete the saved video.