With each new release of iOS, it's getting smarter and smarter. Siri, for example, can satisfy more commands and requests now than she did in iOS 7, but not as many as she will be able to do in iOS 9. This principle also holds true for iOS utilities.
One utility, in particular, is proving to be more useful now than it ever has been, and allows us to make some good decisions based on the information it gives us. I'm talking about battery usage.
When it comes to cell phones, battery is key to a good experience. The last thing you want to experience while traveling to a foreign place is a dead battery. While iOS 8 can't tell you which apps are sucking the most juice as of right now, it can tell you which apps have used the most power over the last 24 hours or 7 days. This information can help you to know which apps to avoid if you need to switch to power-saving mode.
To view this information, go to Settings > General > Usage > Battery Usage. Your screen will look something like this:
If you're like me and use the Messages app heavily, but need to conserve power, this will help you to know to pull back a little on that particular app.
