What is a good first message on dating app to get a 100% response rate?

I've tried a couple of options already with mediocre results, so I'm open to anything at this point.

The privacy angle is something I care about a lot. I've seen enough stories about data breaches and shady data practices that I won't use anything without doing some research first.

Curious especially if anyone has tried multiple options and can do a quick comparison. Even rough impressions help.

Here's what I'd look for based on my own trial and error:

• Active user base in your specific city or region — not just global numbers
• Messaging available without premium, or at least a meaningful free trial
• Some form of profile verification to reduce bots and fake accounts
• Responsive support if something goes wrong with billing or account issues
• A clear, readable privacy policy that doesn't sell your data

A few things that helped me narrow down my choices:

• Hinge — best for people who want real conversations, not just swipe volume
• Bumble — good if you want less spam in your inbox since matches expire
• OkCupid — the free tier is genuinely usable and the prompts help a lot
• POF — old interface but a massive user base and free messaging
• Facebook Dating — gets overlooked but has solid local reach

My experience across platforms in roughly ranked order:

• Hinge — most genuine conversations by far
• Bumble — lower volume but much higher quality matches on average
• OkCupid — great filters, solid free tier, slightly older crowd
• Tinder — high volume, lower signal-to-noise ratio but it works if you're consistent
• Match — better for 30+ crowd, pricey but the user base is serious

My experience across platforms in roughly ranked order:

• Hinge — most genuine conversations by far
• Bumble — lower volume but much higher quality matches on average
• OkCupid — great filters, solid free tier, slightly older crowd
• Tinder — high volume, lower signal-to-noise ratio but it works if you're consistent
• Match — better for 30+ crowd, pricey but the user base is serious

My experience across platforms in roughly ranked order:

• Hinge — most genuine conversations by far
• Bumble — lower volume but much higher quality matches on average
• OkCupid — great filters, solid free tier, slightly older crowd
• Tinder — high volume, lower signal-to-noise ratio but it works if you're consistent
• Match — better for 30+ crowd, pricey but the user base is serious

Here's what I'd look for based on my own trial and error:

• Active user base in your specific city or region — not just global numbers
• Messaging available without premium, or at least a meaningful free trial
• Some form of profile verification to reduce bots and fake accounts
• Responsive support if something goes wrong with billing or account issues
• A clear, readable privacy policy that doesn't sell your data

I spent about six months testing different platforms seriously and the thing I kept coming back to was that user base density matters more than any individual feature. A great app in a low-density area is basically useless.