Just so we're clear on what you're requesting - when you say "delete previous progress" are you thinking about completely eradicating previous progress such that it does not even show up in the reference browsing? If so, I tend to agree. I have added this to our "serious consideration" list for future improvements.
As an aside, you can remove passages from your My Verses list by going into My Verses and hitting Edit on the top right. Then you can tap the red circle to take passages off your list.
This is a great idea! It’s like resetting the mileage button in a car - you naturally want to gauge progress at different times!
Just so we're clear on what you're requesting - when you say "delete previous progress" are you thinking about completely eradicating previous progress such that it does not even show up in the reference browsing? If so, I tend to agree. I have added this to our "serious consideration" list for future improvements.
As an aside, you can remove passages from your My Verses list by going into My Verses and hitting Edit on the top right. Then you can tap the red circle to take passages off your list.