An app-controlled ... coffee maker would appear to make more sense, because you can turn on the device remotely
And having turned it on remotely, what then? Depending on the type of coffee-maker, you'll have various tasks like loading coffee and heating milk that can't be done remotely. Even if you have a bean-to-cup machine that stores and refrigerates its own milk, you'll find it hard to drink the coffee via a phone app.