Your iPhone is not only an excellent communicator-it can be a very effective fitness tracker, too. MOVE ABOUT At the end of your day, you can see where you’ve been (and how many steps it took to get there). It feels almost like science fiction when you first use the Netflix app to stream movies and television shows to your iPhone. The only downside: Apple’s rules prevent Amazon from including a link to its bookstore you’ll need to hop over to Safari to buy more books, though this workaround can make that process a bit less painful. Using Amazon’s Whispernet technology, the app syncs your current page with Kindle Cloud Reader, Kindle for Mac, Kindle for iPad, and actual hardware Kindles. Kindle also lets you search books for specific text, jump to individual chapters, and post to social networks about favorite passages. You can adjust the color scheme of your virtual book (black text on a white background, the inverse, or sepia tones), as well as change the font size.

Unsurprisingly, the interface is simple: You swipe to turn pages, tap and hold on a word to see its definition, and tap and drag to highlight text. With the free Kindle app, you can read ebooks and magazines you’ve purchased from Amazon’s Kindle bookstore. Your iPhone is a lot smaller than a Kindle, but it can emulate one pretty well.

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