Open MathKey on your device.Tap Remote Keyboard.
Enter the session ID or scan the QR code with the Camera app.
MathKey translates your writing to LaTeX expressions right within your favorite text editor.
You can either use your Apple Pencil or your finger to magically write LaTeX equations.
MathKey can convert LaTeX to a beautifully formatted image so you only have to drag-and-drop it to any app — even if they don't support LaTeX.
You can also just tap the image output to share and save it.