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    Quick Info

    Best For

    Lifters who use Claude and want a private, personalised programme

    Key Features

    Goal, equipment and injury interview
    Custom training programme
    Single-file phone workout app
    Optional meal plan

    Community Rating

    IRON/OS logo

    IRON/OS

    paid • From £25 one-time
    Updated Sep 2026

    IRON/OS is a pay-once Claude skill rather than another fitness subscription. It interviews you about your goals, equipment, weekly schedule, injuries and current lifts, then writes a training programme and generates a single-file workout app you keep on your phone, with an optional meal plan. The standout is that it programmes around injuries instead of ignoring them, and the output is something you own: your data stays on your device and there is no account to keep paying for. It costs £25 one-time with a 30-day refund. The trade-offs are clear — you need a paid Claude plan to run it, and it offers fitness guidance, not medical advice, so anyone with serious injuries should still check with a professional. For lifters who already pay for Claude and want a personalised plan without another monthly app, it is a smart, private option.

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    Pros

    • Programmes around your injuries
    • Pay once, no subscription
    • Data stays on your device

    Cons

    • Requires a paid Claude plan
    • Fitness guidance, not medical advice
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    All Features

    Goal, equipment and injury interview
    Custom training programme
    Single-file phone workout app
    Optional meal plan

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