I also use the My Library Android application. I have about 1,200 books scanned through the ISBN tool in that app, which took a few hours across a few weekends. Common issues were old books not being found, or information formatting issues. Overall though - all I cared about was a comprehensive view to track across when we move homes in case any boxes get lost. That app has very limited statistics, but I haven't found myself interested in exploring anything further, nor care about tracking my own reading progress, tbh. Like others mentioned - the scanning is slow and error prone and frustrating. A bulk import from a photograph of a book shelf sounds fantastic, but with re-releases of books, I'd be curious about it's accuracy (reviewing and editing incorrect information is the worst after you scanned the ISBN, so a nice UI like in this app that could make the correction process easier would be great!). The single photo with multiple books and bulk import I would have paid for, definitely. UI of the MyLibrary app is not great, but it is free, and I can export the data, so happy with it. Someone else mentioned multi-user support, which would be nice, but not confident I could convince my family to scan books either. Once you get everything in, scanning additional books as they come is easy.