Appointment Scheduling Software Market by Type (Web-Based, SaaS, Mobile App, and Others); By Organization Size (Small & Medium-Sized Enterprises, and Large Enterprises); By End-User Industry (Corporate, Beauty & Wellness, Education, Healthcare, and Others); By Geography (North America, Asia-Pacific, Europe, Middle East & Africa, and South America), Industry Trends, Estimation & Forecast, 2018 – 2026