Strength training apps

IRON/OS

IRON/OS is a pay-once Claude skill (£25) that builds your training around you. It interviews you on goals, equipment, schedule, injuries and current lifts, then writes a programme plus a single-file workout app you open on your phone to log sessions. Optional meal plan. Data stays on your device and there's no extra subscription or account (it runs on your paid Claude plan). Fitness guidance, not medical advice. 30-day refund.