SmallRig ポータブル吸盤マウントサポートキット（アクションカメラ/スマートフォン用）SC-1K

I parked on a steep hill and this mount held my phone steady the whole time—even over rough pavement. The two locking levers make it quick to adjust and feel secure.

Stuck it to my car window for a quick dashcam setup and it hasn't budged a millimeter on bumpy roads. The release lever makes it easy to pop off and reposition between the hood and side glass. Compact enough to toss in the glovebox when I'm done.

I was a little skeptical about how well a suction cup would hold my phone on a bumpy car dash, but this one hasn't budged at all after a week of daily use. The tightening knob gives a very secure lock, and it's small enough to toss in my glove box when I don't need it.