At least on android you can tap the year and get a year ticker/roller input. You definitely don't need to scroll month by month.

This is what's frustrating with Google's Material Design. If tech-savvy users like me can't even find or know that the year is clickable, what hope do most non-technical folks or seniors have?

Out of interest why not just use an RSS feed for the top posts?

Because I was already have Pushover account for mobile notifications, and started using directly without extra payment or application.

Now I checked after your question, I found this[1] good service, but do you have any suggestion about receiving mobile notifications from RSS (for iOS)?

And you can consider my personal project as an alternative.

[1] https://hnrss.github.io/