Apple to push out iOS 9.3 starting today (it's now live!)21
UPDATE: iOS 9.3 can be downloaded now. It's a reasonable 300 MB update. If you haven't gotten a notification yet, you can initiate the update by going to Settings -> General -> Software Update.
Another new feature of iOS 9.3 is the addition of security for the Notes app. If you keep personal data on Notes, like passwords and PIN numbers, you can save the information and have it protected by a password or through Touch ID. Additionally, the News app will start to feature more customization as the "For You" section will now include recommendations and trending topics.
If you are sporting the Apple iPhone 6s or Apple iPhone 6s, new 3D Touch features will be available for native apps like Weather, Settings, Compass, Health, Stocks, and Store. Also getting updates in iOS 9.3 are CarPlay and Apple Health. The former will make song recommendations and help you find certain points of interest including a gas station. The latter will now integrate with Apple Watch and track third-party apps.