Adaptive Rotation Lock (Free) for Android - Download the APK from Uptodown
Dreafly 360 Degree Rotation Adaptive Phone Mount-360° Rotation Gravity Stable No Jitter Easy Mount,Easy One Touching Universal Car Mount For Car : Amazon.co.uk: Electronics & Photo
Tip: With rotation lock enabled, rotating your phone to landscape will show an icon on the bottom right that changes the screen's orientation without having to disable the lock first : r/galaxys10
Enable rotation lock by default in Windows 10 - Super User
How to Lock Screen Rotation in iOS 9 - Solve Your Tech