Gender DNA test

I'm curious if anyone has ever tried the sneak peak gender test? Or the peakaboo one? The sneak peak says you can find out as early as 8 weeks and the peakaboo says 7 weeks.. I'm so curious already, that I'm very tempted, but at the same time, I want to have a gender reveal party, and we aren't announcing the pregnancy until at least 12 weeks, so by then I could just have a private ultrasound that only costs around $50-$60. Any advice? I'm trying to just not think of baby's gender yet, but it's so hard! How do you ladies do it that don't find out until the birth???😅