|Vastar universal smartphone tripod adapter and a long iPhone power cord to keep things going in the cold. This is an iPhone 6 and I even left the case on, and the adapter still works with it.|
Above photos are star trails taken with the iPhone on a tripod mount, completely in-app using Night Cap Pro, no additional stacking or exporting the photos. It's a single long exposure using the light trail mode in the app. I tweaked the photo on the left a little bit, and the one on the right is exactly as it came out un-edited.
|The battery drains fast if it's cold out, so the power cord is helpful if you are near an outlet|