So, how about you have an option so you can set where you get a message (or similar notification) when you get a certain amount of kills that day? Say that you set it to say "Notify me when I have 2K kills in the past 24 hours." It would make it a lot easier for people who have daily goals that they are trying to reach.
It could also have a page where it shows like how many kills you have gotten that day. For instance if your goal is 2,000 kills for that day, and you've gotten 500 kills, it would say 500/2,000.