TidyCal

I purchased Tier 2 expecting a reliable team scheduler.
The Round-Robin only works if every team member creates their own account and upgrades, which multiplies cost and makes the feature impractical for real teams.
The UI/UX is unintuitive in several places, but the critical issue is reliability: the app repeatedly books meetings when I’m already busy — it fails to correctly read or respect my calendar availability, causing double-bookings.
I triple-checked my settings and integrations; there’s a small chance it’s my mistake, which is why I’m giving 2 stars instead of 1.
However, I’ve used many calendar apps (Calendly, Cal, etc.), and if this is user error the interface is still extremely confusing.