Not the same person but I would suggest using zotero for this purpose. This is one of the best use case of zotero (try zotero 7 beta). Combined with its iPad app you will find it can tick all your requirements.
I recently went back to school and started using Zotero again. Reading and annotating books and papers on iPad, and then having access to all of my notes when writing on desktop is such a simple but amazing feature.
I recently went back to school and started using Zotero again. Reading and annotating books and papers on iPad, and then having access to all of my notes when writing on desktop is such a simple but amazing feature.