Probably the Plank, or Plank mini…
every other brand of (flake or pellet type) auto feeder I have experience with (Hydor, Eheim, Fish Mate, Hygger, etc) is effectively an unreliable toy… (seizing up, dispensing too little/too much food per-revolution, eating batteries, not enough programming options/control, letting food get moist and clumpy, etc…)