So after initially launching on Hacker News, and subsequently building out a paid subscription service, I decided to launch again on Product Hunt (for the first time).
To my surprise, the post reached #3 top product of the day! I got a lot of good feedback, and received ~1.5k visitors to the site, with ~150 app downloads, and 10 new subscribers.
I got a lot of users that signed up without completing checkout, so I'm not sure if they bailed at the checkout step, or just didn't know that sign up is not required to use the app. Probably a mixture of both.
At this point I'm thinking of what my next steps will be for promotion.