Let’s face it – having to pay overage charges for using more minutes than you get with your smartphone’s data plan can go way beyond irritating. Luckily, there are some apps that can help you quickly and easily keep data use – and costs – in check: DataMan Next is an iPhone and Apple Watch app with a super easy interface that’s especially user-friendly. DataMan checks your usage at any point from any screen simply by reviewing your iPhone’s notification center. DataMan can even forecast usage to help you stay within your data cap. It costs $1.99. My Data Manager is for iOS and Android and helps monitor data usage…