Genius Scan, free iPhone app. Produces quality images. Batch mode for multiple pages, or single mode. “Magic edge” to automatically find clean edges. Multiple ways to store or send. Editable. Embedded tutorials.
That’s all I’ve used for business and personal since 2014. I have forgotten how to use the scanner on our multi-purpose printer. Use a dark surface to set items on for best contrast. I’ve used the back of a navy t-shirt, a dark towel, the black front of my laptop case. Typically, from the app, I email the file to my business or personal account, re-name there and attach as needed to email. Genius Scan works with the iPhone Mail app, which you simply link to one of your personal accounts.
I use this for my business travel reimbursement receipts, where clarity is very important, and I can create 1 document with as many receipt images as needed, whether restaurant receipts or full-page hotel bills. Accounts Payable asked me to create an in-house tutorial on using the app, because they were tired of straight photos and lack of clarity from others.
I also use the free Adobe iPhone app when I need to merge scans into 1 file.
It works for me, but may not meet others’ needs.