Automated fish feeders

[anxious_ant]

We are planning to away for 3 weeks and currently searching for suitable automatic fish feeder for my 390L tropical tank. Feeder needs to handle both flakes and sinking pallets and support programming by day (as I feed every 2/3 days).
Bonus if the feeder is smart and I can control via app, but that is a nice to have. Needs to have adjustable clamps so I can mount on the side of the tank.

From research so far I am leaning towards Eheim and Tetra products but not sure if they are any good. Looking for recommendations

[dxbtiger]

never used one but Eheim especially and Tetra are regarded as good brands