We are in the process of moving are workflows and files into SPO. One hurdle is that we have several field staff that currently download a fillable PDF to their Android tablet, fill it out, save a copy of it, and then email it to the intended recipient. This is obviously time consuming and prone to errors.
I have a few questions about possibly moving this into SPO:
I've noticed that the browser version of a PDF auto opens in the SharePoint PDF view screen. You cannot add the details (fill out a text field) unless you open in up in the browser. That the only way?
It's worse on the Android tablets. You need an app like Adobe Reader. Open the PDF SPO, select to open it in another app, but then you're in the same boat of downloading copies and saving an extra as a PDF.
Is PowerApps and PowerFlow the only way to do this? It doesn't seem like you can make a "pretty" form in PowerApp (only have the phone/tablet layout options).
I'm worried then about the number of flows we can use per month.
Any info would be greatly appreciated.

