How do set a estimated time above 300 minutes?

On iOS, the maximum estimated time you can set for a shot or note is 300 minutes because on iOS we use a slider to set time and if we make the top value too high, then it would be too difficult to accurately set the lower values.

If you want to make the shot time longer than 300 minutes on iOS, simply long press on the shot time to manually enter a time, or open the shot settings and type in a manual amount of time.