Years ago I used to have an app on my phone that would advise you which was the best cc to use for various categories (grocery stores, gas, etc.). I didn't have so many cards then and didn't really use it. I don't have the app anymore. Now I have a lot more cc's and find I am getting mixed up (4x points on grocery on personal Amex gold, not business <argh>). Does anyone remember what the app is called? I looked in the app store and only found one with a similar function but as it only had one review it seemed a bit sketchy.