Skimming the UHD Title Support list, MakeMKV seems to have just as many (if not more) supported titles than deUHD does, and more titles are added daily (versus weekly with deUHD, and only maybe ~10-15 a week).
If we aren’t there already, it seems like deUHD is or soon will become obsolete. It’s too bad for early adopters like me that paid through the nose for the app and a certified UHD drive, but they did at least get the ball rolling.
But because they’ve nickel-and-dimed customers (first by arbitrarily limiting to 2 discs per day and not originally making that clear on the website) and then introducing the new “Pro” tier with 6 discs a day and not upgrading early adopters to the new tier, I say good riddance to them. Ripping also takes forever with deUHD, it’s much faster and more reliable with good ol’ MakeMKV—and as many rips a day as you want. For free.