Qiqqa is by far the strongest solution for research and managing pdf's. Zotero, named as a comparison is weak as it does not allow pdf;s to be loaded into its interface - you need to use a pdf reader, which defeats its whole purpose. With Qiqqa documents in a library can be searched together. It has excellent maps of your libraries. It is not prefect, having a few glitches, but still is the only one of its kind.
Based on our record, Scanner Pro seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Example: https://readdle.com/scannerpro. Source: over 1 year ago
If you don't need to edit your notes and just want digital copies, then https://readdle.com/scannerpro might be a good quick solution – you can search your notes even though they are images which is pretty neat. Source: about 3 years ago
Office Lens - Download this app from Microsoft Store for Windows 10, Windows 10 Mobile, Windows Phone 8. 1, Windows Phone 8, Windows 10 Team (Surface Hub), HoloLens. See screenshots, read the latest customer reviews, and compare ratings for Office Lens.
Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Genius Scan - On The Go.
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Scanbot - Scanbot is a mobile app that allows you to use your device's camera as a document scanner. The app is capable of scanning a large number of source materials, and it can handle QR codes as well.
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .