I think the phone app is actually a good thing... in concept. It allows for a lot of convenience; not just when you're out of the house, but also while actually using the game. For instance, right now if I'm playing Ultra Sun and I want to check, say, which Love Ball Pokémon I have; that collection is so large that I don't keep it in Ultra Sun myself. So what I have to do is save, switch off the game, go into Bank and all its connecting and loading, go to my Love Ball collection, confirm what I have, and then switch Bank off and go back into Ultra Sun. Multiply that many times over for other collections like Legendaries or Vivillon or Living Dexes or just finding a specific Pokémon in general. By having the app also available on a separate platform, I'm able to just go into it while playing the game without having to shut either one down; making it a lot more convenient, and for that added feature I'm happy to wait a little longer. ... also, it possibly means that I can pay for Home with iTunes cards I get for christmas from family who don't know what to get me that I don't use on anything else; so that's pretty neat too.
What I'm not happy about though is the locking of certain features like Mystery Gift behind the Phone version. And it mystifies me, honestly -- usually when there's a weird decision like this that just inconveniences the player, an answer can often be found in "because it makes more money for the company". But this one's just baffling -- are you expecting to be able to sell phones through locking Mystery Gifts behind them?? Do you think it'll make it more likely that someone will click on Pokémon Go or Masters if they're on their phones to begin with? What's the reasoning behind this?