Mental Health Apps Market Size, Share & Industry Analysis, By Platform (iOS, Android, and Web-based), By Application (Depression & Anxiety Management, Stress & Burnout Management, Meditation & Mindfulness, Sleep & Relaxation, Mood Tracking & Emotional Wellbeing), By Delivery Model (Self-guided, Therapist/Coach-assisted, and Hybrid), By Business Model (B2C, B2B, B2B2C, and Hybrid), By Payment Model (Freemium, Subscription-based, One-time Purchase), By End-user (Healthcare Providers, Homecare Settings), and Regional Forecast, 2026-2034