I found an issue. In the APP I don't have HDR switch only WDR but in the dash cam menu it exists and has 3 options: off/on/timer. I turn on the timer and will have a look at how it works. Also maybe somebody can help with a better resolution? 2560*1440 30fps is the best idea to use? I see somebody using 1440*1080 for better sharpness. Does HDR work better in 30fps or in 60fps?