You need a dedicated audience first before you can begin charging money. You need to just build the app and make this app something the users come to rely on. T

You need a dedicated audience first before you can begin charging money. You need to just build the app and make this app something the users come to rely on. Twitter is a service designed on simplicity of use and so it isn't exactly prohibitive for them to just not use your app. Charging money might see a few conversions but on the whole, you're not ready for it.