How about for both? Without app developers and customers, it wouldn’t exist.
I would argue that at this point, app developers have been so thoroughly commoditised by the App Store that it is the customer who has the power in this relationship. And Apple by extension of owning the best customers. Right now at least, my loyalty to the Apple ecosystem is such that if Google were to remove all their iOS apps right here and now, I would show them the middle finger and stay on iOS, so as to send the message that if they want to reach me as a customer and profit off me, they will support the iOS platform the best they can. Because I am most certainly not going to switch over to Android for them.
At this very moment, there are so many developers releasing similar versions of any one app that even if a couple left, there would be still be others to step in and fill in the gap. And I have no doubt that they will, because iOS is ultimately where the money is.
And while we are on the topic of apps, I see the merit of Apple giving their own stock apps 1st-party status. This way, the apple ecosystem will never be held hostage to any one app, no matter how popular or indispensable it may be. If Spotify tries to play punk, I have Apple Music as an alternative. Even if all the movie-editing apps disappeared overnight, I would still have iMovie.
If anything, it would appear that Apple makes their stock apps only about 80% of the way there to give other third party apps a fighting chance. How do you compete against a stock iOS app that benefits from being the default preinstalled app with system-level integration? You target a niche and focus on bringing features and functionality that you know Apple can't or won't introduce. Like how Spark to Mail, Bear to Notes, Overcast to Podcast, or even Fantastical to Calendar. So in other words, the stock iOS apps provide a minimum bar that other apps have to clear if they even want to be considered.
At this point, I realise I am likely coming across as being way more mean and vindictive to app developers than I probably intend. My intention is not to tar all developers with the same brush and insinuate that all of them are crooks who need to be reined in with an iron fist, but on the other hand, there will always be bad actors, and sometimes the process of managing them means the "good guys" have to suffer along and chafe under such strict and oppressive rules, and that's the way it goes.
And since we are on the topic of stock apps, I do go back and play around with them every now and then, and I find that maintaining a united front of Calendar, Mail, Reminders, Notes, and so on tends to lubricate the interactions between my devices, Siri, iCloud, and the apps themselves. I can't really explain it, but I am slowly coming to the realisation that the more I give in to accepting that some of these stock apps provide the core functionality I need in a certain app, the less I find my mind wandering toward exploring an endless array of options and falling into a rabbit hole of tweaking workflows and deluding myself into thinking it’s helping in some way.
Something’s changed. In the past few years. I’ve lost my taste for fiddling a little bit, and the stock apps have gotten better. Enough for me to truly consider using them over third party alternatives.
Anyways, thanks for listening to me rant before I turn in for the night.
