Freelancers or Remote Teams: Do You Use Async Standups?

I'm working on a tool that auto-summarizes async standups and check-ins, and I'm curious about your experience.

Do you use async standups?

If yes — are they genuinely useful, or do they just feel like a formality?

I’m exploring how teams stay aligned without adding overhead. Would appreciate your thoughts. If you're open to it, I can also share a quick demo of what I’m testing.