A Kindle works fine on its own, but it becomes a lot more useful when you use it with select free apps. You can use things like Calibre, Libby, Send to Kindle, Instapaper, and StoryGraph to convert, ...
Sure, you can read books on your smartphone if you want to, but you'll get a cut-rate experience. Here's why the Kindle is still the best reading option.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results