I could never remember that I wanted to form a habit and all the existing apps only had a daily reminder. I made goalie to have several custom reminders per habit so it'd be hard to forget.
I published on hacker news and it made the front page. I got over 1000 app installs and 20 or so paid users.
Product hunt also featured my app without me doing anything, which was cool.
Another website, all about Android, did a highlight as well, was pretty neat.
I could never remember that I wanted to form a habit and all the existing apps only had a daily reminder. I made goalie to have several custom reminders per habit so it'd be hard to forget.