What do GLP-1 tracking apps get wrong?

If you've used a GLP-1 tracking app (Ozempic, Wegovy, Zepbound, Mounjaro, whatever), what made you stop using it, or never start? For me it was that every app I tried was scale-obsessed and injection-first, while the actual conversation in GLP-1 communities is constantly about muscle loss, not just weight loss. That gap is what I built Sustain around.

Curious what's missing or broken in the ones you've tried, good or bad, happy to hear it before launch day.