Even if you set an iPhone to PAL 25fps the Moza Genie app will only offer 30fps. The app does not take any notice of the settings on the phone. The gimbals are wonderful, but the app is terribly lacking in useful functionality.
On an iPhone, using Moza Genie, the only choice of recording format is H264 or H265 in a Quicktime container. In both cases, the video will be out of sync with the audio, whereas using the iPhone Camera app or any third party gimbal app using H264 in a mp4 container will result in perfect sync..
Tomáš Faltys