1 to 1 comparison of stats

Right now, if you have your stats set to Weekly, Monthly, etc. you can see how the stats of the current time frame compares to the last one, with a percentage.

Say you have this set to Weekly, and have been listening to music all day through Monday. Although you have listened to more music than the previous Monday, the stat comparison would still show your current data against the entire week before.

It would be nice to see this data compared to the same amount of time in the previous week.

If you checked this app half way through the week, then your latest data would be compared to the first half of the previous week.

This should be toggleable as both data comparisons are good in their own ways.