The Ulanzi U-PAD III Metal iPad Tripod Mount is an all-metal aluminum alloy body tripod mount. It is very well-built and feels premium and solid.
It can mount any device ranging from 10 cm to 23 cm.
So, although it is meant for iPad, you can still mount your iPhone in landscape mode since the length is longer than 10 cm.
Since this is a tripod mount, the screw hole is 1/4″.
The mount also comes with a cold shoe mount on top.
I highly recommend getting this if you are looking for an iPad tripod mount. The build and quality are just fantastic.