A more universal tool in the world of photography is the use of grid lines. The iPhone's default camera app supports this feature — here's how you can enable and use it. Read more: 12 Smart ...

The 6s and 6s Plus are nearly identical in size to the iPhone 6/6 Plus but come with the faster, more battery-efficient A9 processor, an improved fingerprint scanner and camera (see Live Photos).

How does the iPhone 6s and 6s Plus fare against last year’s iPhone 6 models and Samsung’s Galaxy Note 5? WSJ’s Geoffrey A. Fowler makes the call, in a video shot entirely on an iPhone 6s Plus.