It's my understanding, and based on my experience with the api smart Auto feeder that was also wifi capable, that you can only control the feeder via WiFi if your phone is also connected to the same wifi at the same time. That does you no good while you're traveling away from home. With my solution there is a hub that controls the switch bot that allows me to control the feeder from anywhere in the world. I think you'll find these wifi feeders to leave you unsatisfied.
Not sure about the API feeder you mentioned, but the Ilonda/londafish feeder is Alexa/Google compatible and can be operated remotely via the app or via Alexa/Google, so it does not appear to have the same limitations as the API unit you mentioned.
It appears there are many generic/chinese made feeders that all appear to be the same feeder. Ilonda, londafish, Aquabasik, etc... but it looks like one branded DollaTek is priced the cheapest at $19.99. It appears they all tell you to download the same Ilonda app, so I'm guessing they are all identical feeders being sold under various generic names.