(Paid) Unread posts since last visit

Hi there, i´m looking for a possibility, to show members the sum of the unread posts since last login (and a link to them of course).
I know, there´s an addon from Ragtek, but this addon shows only the latest threads since last visit.

Is somebody out there, who can create something like the described above?



same here. I'd like to see a mod that acted like alerts but said new posts. the button could say 'activity' and the red bubble would also show up with the number of new posts since the last visit.

I'm sure many would like this.