As a longtime Adobe Photoshop and Lightroom user, I periodically consider buying a digitizer, such as a Wacom tablet, to better take advantage of editing with brushes and other tools that work with pen-based input. I know photographers and artists who swear by them, but it would be a significant expense for my comparatively modest editing needs.
It turns out, though, I already have an excellent pen-based touchscreen device: an iPad Pro with an Apple Pencil. More often than not, it’s usually on my desk at home or in my bag at a coffee shop.
Astropad Studio ($79.99 per year) turns that iPad Pro into a digitizer. Most Wacom tablets incorporate a pen-sensitive surface that transmits strokes and taps over a wire. If you want to spend at least $800, the Wacom Cintiq provides a touch-sensitive screen on which to work. (Wacom tablets that don’t incorporate a screen start at around $60.)