Program to keep track of monster kills?

If you're doing a challenge for 'x' number of ankous then what the others said is the best way to do it. Simply check how much XP you get in hitpoints from them, and whenever you feel like it just check how much HP xp you've gained and divide by how much they give you.

I decided to not do the challenge because I will be doing other things on the side such as slayer and I really do not want to keep track of all that.