If you didn't notice, you switched the conversation from "Apple iPhone" to "smartphone".
In any case, I didn't get an iPhone until 2012 and for the entire 7+ years of ownership, I have never installed a single app on it. I just use the plain vanilla functionality. An Apple product like the iPhone and the Apple curated App Store is not essential to life.
About 90% of my friends & family use Android (the more popular smartphones) because they cost less than Apple.
EDIT to downvoters:
- gp comment (rahkiin) of Walmart-restrictions analogy is about Apple (not "smartphones" in general)
- followup comment (jfk13) is also about Apple iPhone and not smartphones
- pentae's comment that switches the subject from "iPhone" to "smartphones" ... to try an win an argument just confuses the thread