Fort: The First AI Wearable Built Specifically for Strength Training

Every fitness wearable tracks your run. None of them properly track your strength training. Fort is the first to seriously try.

Built by ex-Tesla and SpaceX engineers and backed by Y Combinator, Fort is a screenless wristband that auto-detects 50+ exercises, counts reps, and measures bar speed, range of motion, and proximity to failure — all from your wrist.

What Makes Fort Different

Unlike Apple Watch or Fitbit which treat weightlifting as an afterthought, Fort is built from the ground up for the gym. Key features:

• Auto-detects 50+ exercises without manual input
• Counts reps and measures bar speed in real-time
• Tracks range of motion and proximity to failure
• Breaks sessions down by muscle group stimulus (maintenance, growth, overload)
• Charging case doubles as equipment-mounted motion sensor for lower-body tracking

It also tracks sleep, stress, HRV, and cardio — so it replaces rather than supplements your existing wearable.

Who This Is For

Serious lifters who want data-driven training without the hassle of manually logging sets. If you’ve ever spent more time typing into a workout app than actually lifting, Fort is the answer.

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The Bottom Line

Fort fills a genuine gap in the wearable market. Strength training is the fastest-growing fitness segment, yet every wearable treats it as secondary to cardio. A YC-backed team from Tesla and SpaceX building the hardware that gymbros actually want? That’s a smart bet.