Built a Strava-synced app to solve finding running partners in Rotterdam. How do you tackle hyper-local density?

Hey Indie Hackers! 👋

I recently moved to a new city (Rotterdam) and realized something frustrating: finding a running partner who actually matches your exact pace, distance goals, and schedule is surprisingly hard.

Strava is great for tracking, but terrible for social discovery. Group chats are chaotic. And while local run clubs are awesome, they don’t always fit your schedule or pace for a random Tuesday evening recovery run.

So, my co-founder and I decided to build a solution: Zinq (joinzinq.com).

🛠️ What we built:

Zinq is a hyper-local platform starting exclusively in Rotterdam. It connects runners with compatible pacing partners in their immediate neighborhood by syncing their actual Strava run data (so pace matching is automatic and verified).

❓ Question for the IH Community:

We just launched our waitlist landing page and started getting our first local visitors.

For those of you who have launched hyper-local consumer apps (city-specific marketplaces, sports matching, etc.):

1. How did you achieve critical mass in your first city before expanding?

2. What offline or online growth hacks worked best for local user acquisition?

Would genuinely love any blunt feedback on the landing page (joinzinq.com) or positioning!