It’s true that you don’t need a lot of equipment to work on wheels — you can eyeball alignment, feel tension with your hands, hear tension from plucking spokes, etc. I want to do better anyway.
I’ve incorporated three digital tools in my process. First, I use a Park Tool truing stand with Mitutoyo digital gauges. The roller tip on the lateral truing gauge is made of teflon to prevent scratches. Second, I use a Park dishing tool with a digital gauge attached so dish is known quantitatively. The next best alternative is using feeler gauges but digital is much faster. Last, and just recently, I’ve been using the Wheel Fanatyk digital tensiometer. The Wheel Fanatyk people are cool cats and I’ve updated my spoke tension utility to support their tool. Check it out!