I really hated this too, so I wrote an app a few years ago for this, to tell you exactly how much to put on your card no matter how much you have on it. [Insert

I really hated this too, so I wrote an app a few years ago for this, to tell you exactly how much to put on your card no matter how much you have on it. [Inserts shameless plug for Metroptimizer.] https://itunes.apple.com/us/app/metroptimizer-2/id649185762?mt=8 https://itunes.apple.com/us/app/metroptimizer-2/id649185762?....