I honestly hate dealing with the scanning apps. They're ok, but they're not cheap and require a subscription. I've been looking to replace them with an actual scanner.
Genius Scan Enterprise is a non-subscription "pay-up-front" scanning app that I've used (on Android) for at least 3 years with complete satisfaction. Current price 25USD but I recall paying noticeably less (I share the app with other users in my family to defray the cost). I previously owned a Fujitsu fi-5110EOX sheet-feed scanner that I thought was the pinnacle of scanning goodness, but when it died after 15 years, Genius Scan proved a more than sufficient replacement for me[1], such that I returned the new Fujitsu sheet-feed scanner I'd bought to replace it for a refund.
I have no affiliation with any of the products I've mentioned above, just a user.
I have no affiliation with any of the products I've mentioned above, just a user.
[0] https://thegrizzlylabs.com/enterprise/
[1] NB: my use case does not involve a significant amount of scanning high page count documents.