I found a Cool Tool a few nights ago: KDE Connect
Project page
App download for iPhone
Allows you to wirelessly connect your Linux computer & iOS/Android.
You can transfer files (similar to Apple’s AirDrop), run commands remotely, and even use your phone’s touch screen as your computer’s mouse - sooo cool!
The app feels high quality, which I appreciate!
I have found it useful for vectorizing photos. I can take a photo using my iPhone’s camera, use KDE Connect to send it to my Debian Linux machine connected to the CNC router, vectorize the image using InkScape “Bitmap tracer”, and then get that into Kiri:Moro / FreeCAD to convert the 2D shape to 3D design & job, and then pop it into Universal G-Code Sender, to etch it into wood using the CNC router.