What's a good iPhone app for tracking how much I'm actually reading, and maybe even motivating me to hit some goals?

Look, I'm not much of a reader these days, but I know I *should* be. I need something that'll gamify the whole process, make it less of a chore. Bookly seems to do that. It tracks your reading speed, reminds you to read, and lets you set goals. They even have some kind of reward system with diamonds and outfits, which, okay, sounds a little silly, but if it gets the job done, who am I to judge? The bottom line is, if it helps me knock out a few more books a year, especially stuff related to business and marketing, then it's worth a shot. I need something to keep me focused, and this might just do the trick. If it saves me even an hour a week of procrastination, the ROI is solid.