Direct Answer
For most U.S. service businesses, Calendly (free–$16/seat/month) is the simplest. Acuity ($16–$49/month) handles intake forms and packages. Square Appointments ($0–$69/month) bundles payments. GoHighLevel includes booking inside the CRM. Pick the one that integrates cleanly with your CRM and Google or Microsoft calendar.
Short version
“Calendly is simplest. Acuity handles intake forms. Square Appointments bundles payments. GoHighLevel includes booking inside the CRM.”
Always enable buffer time between appointments — prevents back-to-back overruns and gives you time to context-switch.
Use round-robin assignment if multiple team members take appointments — distributes load fairly.
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