Nothing you'll do now matters for the future of your product, not even your appearance on product hunt (which barely is read by your target audience anyway), so just continue with what you were doing before.
I second this, as the perception that PH traffic matters to the long-term success of a startup is a very toxic viewpoint that many naive entrepreneurs hold. (The content-less thought-pieces stating "How I Got #1 on Product Hunt" on Medium do not help)
Product Hunt in general is a negative externality on the startup ecosystem, but that's a topic for another day.
lol....how can I possibly convince you to use it :)
In all seriousness thanks for the comments. They're giving the sense that Product Hunt won't make us overnight millionaires and we've got a hard task ahead of us
Try content marketing? Blog some focused pieces on native mobile dev in general and what sucks, then show how your product makes everyone's lives better and saves the day.
Set a schedule and post, that's the way people will see your name from time to time, and after seeing it for 10 or 20 or 50 times, might want to try. Get on their radar.
See Auth0's blog [1], even though they sell one-click auth, they have a lot of neat content on front-end frameworks and so on.
Welcome to reality. Follow all responses that say to focus on customers (either users or revenue). Flash in the pan hype are blips on the radar for the marathon you are just now starting
Product Hunt in general is a negative externality on the startup ecosystem, but that's a topic for another day.