I think there's ambiguity. An app built for a platform that does xyz. Does the app do xyz, the platform, or both? If I build an app that takes you straight to idk a Treasury department website, have I built an app for a platform that transacts trillions of dollars?
I thought that at first too, but then I figured it's pretty impressive that the app is processing $6M/month even though the financial platform pre-existed.