Libby, by OverDrive 4+

This app is brilliant for its main purpose, borrowing and reading library books, but also all the supporting features are pretty solid too. You can add cards at multiple libraries and manage the loans and holds across all seamlessly.
There is a history and timeline of the various books you have borrowed, placed on hold and returned which is already proving useful. Whilst reading a book, you can highlight passages or look up the meaning of words and phrases. The definition uses the Oxford Dictionary as well as ‘topic’ results from Duck Duck Go which are amazing succinct summaries with related topics also being surfaced. Links to extend to google, Wikipedia etc are also provided. After finishing a book (and during actually) you can view the timeline of your reading ‘journey’ of a book, and downloading this gives you a super cool web page summary of all the salient details including all the passages you highlighted - awesome (csv also available).
Extra things I would love: history of all definition look ups, a la kindle; intelligent rules for look up e.g. if I select one word automatically show the definition - if I select multiple words automatically highlight in the last colour, clicking on the highlight remains the same if you meant a one word highlight or to check a multi word definition; search across all libraries I have registered.
All in all a fabulous app, credit to the development team for creating something so usable.

This app is fantastic- so many titles available immediately! It means I’m never without a book. It’s really easy to browse and it downloads the books straight away. And if it’s not available you can reserve it and it pops up on your ‘shelf’ when it’s ready to read!
The only thing that would make this even better is if there was a ‘save for later’ function to remind me what I saw on a previous browse but didn’t borrow as I knew I wouldn’t get time to read it.
But I love Libby anyway! And it must be helping the environment not printing and then disposing of books (although I never throw a book away but my house is starting to feel very crowded with them!). Also, lenders don’t have to travel to the library to borrow and return books but I do hope that older readers are helped to embrace this technology so that they can also benefit.