Run Buddy AI is a voice-guided running coach that structures workouts around the time you actually have. Tell it how long you can run today, and it builds a session for you — then coaches you through it live with spoken pacing cues and real-time guidance, so you can keep your eyes and attention on the road instead of a screen. After each run, it provides a brief analysis of your effort. The experience is designed to feel like a training partner in your ear rather than an app you check mid-stride. Run Buddy AI works with any OpenAI-compatible or OpenRouter API key, and supports Apple Intelligence on compatible devices. API usage per workout is minimal — typically a few cents or less — making it practical for daily use without meaningful cost. A solid option for solo runners who want structured training without a subscription coaching service.