Can anyone recommend a decent PDF scanner for free for Android?

CamScan only allows sharing via email on the free version
ScanBot quality is terrible
Office Lens quality leaves what to be desired, and is a hassle to deal with

I want to scan PDFs and save to OneDrive, but it's almost like Microsoft wants me not to. At least with Google Drive, it's simple - go where you want to save the document, upload via scan, and voila. With OneDrive, it seems anything but simple