The efficient method ...
PIJU Bike Phone Mount
̶1̶9̶9̶.̶9̶0̶ ̶l̶e̶i̶ 79.99lei

- The slim transparent window cover style helps you to navigate and shoot video with your phone; Support for Face ID and Touch ID fingerprint recognition, as well as a fingerprint sensor on the front, make this phone ideal for cyclists.
- This motorcycle phone mount has a built-in magnetic that will keep your phone in place and secure, even on a bumpy lane.
- Full-coverage phone holder suits most smartphones with a screen size of 4 to 7 inches, including the iPhone 11, Pro Max Xs XR X 8 Plus 7, 6s 6, and 6s Plus.
- Samsung Galaxy S10 + S10e, Samsung Galaxy S9, Samsung Galaxy S8, Samsung Galaxy Note 9, LG, and other mobile phones
This item is exactly what I had in mind for my bike. The fact that it can swivel is perfect for my purposes.