I've got a web application with monthly subscription fees. What's the easiest way to implement monthly billing? Is there an app out there that handles that kind of stuff for you?
Side-question: what's the cheapest way? That is, requiring the lowest transaction fee.
The cheapest is to use a service like Paypale/FirstData/etc which are a bit more tricky to setup that the cheddary/spreedly but also offer recurrance charging. The catch is you'd have to keep track of the user data and management, and slighly more tricker to change providers .