Fasting tracking times

I've had the app for one week.  Not sure how useful the current approach is for fasting times as I'd like to be able to track my cumulative fasting times across calendar days for a give time period.  For instance, last food is 7pm one day and then fast until 1pm the next day...... needs to show that I had 18 hours of fasting.

The current way the app is set up, it would show 5 hours credited toward one day, then 13 hours hours applied to the next day.   However, the app also adds the # hours from last meal until midnight that same day.    This approach does not accurately reflect the fasting window.

Is there a way to set up a timeline approach?  So that the tracking report simply shows amount of time between meals/snacks rather than a cumulative amount per day since midnight?  Or both if the cumulative amount is working for some people.

Thanks.