how the ai coach works
not a template engine
Syntax's AI coach is a conversational AI that reads your actual training history — every set, every exercise, every session. It understands your available equipment, your recent volume, and your goals. When it writes a program, it writes one that is genuinely yours.
how it works
- You tell it what you need in natural language — "give me a leg day for 30 minutes" or "upper body push, I only have dumbbells today"
- It reads your workout history and knows your equipment
- It writes a structured program in markdown — warmup sets, working sets, RPE targets, rest guidance
- You tap to start training immediately
six coaching personas
Pick the voice that keeps you training. Switch anytime.
Or edit coach.md directly for a fully custom persona — rewrite the system prompt, change the coaching philosophy, make it entirely yours.
coach memory
The AI coach remembers you across conversations. Your profile, training preferences, injuries, goals, and patterns are stored in a memory.md file on your phone — plain text, fully editable.
The coach learns your context over time so you don't have to repeat yourself. And because it's a markdown file, you can read, edit, or delete anything it remembers.
your data stays private
AI coaching does not mean cloud storage. When you send a message, it is routed through a secure proxy to the AI provider. Nothing is stored on our servers. Your workout data never leaves your device — the AI sees only what you send in that conversation.
Read the full details in our privacy policy.
pricing
The AI coach is part of Syntax Pro — $3.99/mo or $29.99/yr. The free tier includes unlimited workout logging with no ads. Pro unlocks AI coaching, personas, and more.
a coach that actually knows your training.
