Main features: privacy-first custom AI chat experience with 14 Jungian archetype-based personalities (e.g., Joker, Caregiver), customizable themes, private subdomains (yourusername.yourownai.net), base models (GPT-OSS or DeepSeek R1 0528), and optional external data access. Supports both chat and report modes (triggered by commands). Use cases: daily conversations, writing assistance (report generation), personalized life guidance (e.g., health advice, project initiation). Core advantages: end-to-end privacy (no chat storage, private cloud server), high customization, flexible output modes. Pricing: free tier and three paid tiers (Spark $8/month, Vibe $22/month, Flow $99/month), with 2 months free on annual billing.