I have that same app (I think) and have never encountered any ads. Is it the one that is primarily blue with lime green writing on the app icon?

I have "C25k Free" but there are so many ads, and I cannot stand clicking through them all. The volume is also too low (even when on max) for me to hear the notifications.

Are there any other free (or $1-$3) Couch to 5k apps that have the same basic functions, but without as many ads to click through?