IRON/OS is a pay-once Claude skill (£25 one-time) that builds a workout app around you. **How it works** - Claude interviews you on your goals, equipment, weekly schedule, injuries and current lifts. - It writes a training programme that works around those injuries and constraints. - It builds a single-file workout app you save to your phone and use at the gym. - Optional: a meal plan to match the programme. **Details** - Your data stays on your device. - No extra subscription (needs a paid Claude plan). - Fitness guidance, not medical advice. - 30-day refund.