In “” (28 March 2016), we reported that many users were experiencing app hangs and crashes after tapping Web links. Apple has released iOS 9.3.1 specifically to address this issue. A number of users had complained about similar problems in iOS 9.2.1; it will be interesting to see if this update addresses their complaints as well.
To download the small update (27.5 MB on my iPhone 6), go to Settings > General > Software Update or update via iTunes. I haven’t noticed any problems with this update so far, but it did seem to take an unusually long time to install on my iPhone 6.