STRN: Gym Log & Hyrox Tracker

STRN is a gym log and workout tracker for people who lift — and who also run, row and race. Log every set, watch your strength compound, and let the recovery model tell you what to train next.

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WORKOUT TRACKER & GYM LOG
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• Fast set logging with a gym-built keypad, rest timer, superset support and RPE.
• Automatic weight suggestions on every set, based on your own history.
• 1,400+ exercises with GIF demonstrations and form tips — barbell, dumbbell, machine, cable, kettlebell and bodyweight.
• PR detection, volume trends and per-exercise e1RM history.
• Ready-made routines — full body, push/pull/legs, upper/lower, 5x5, hypertrophy — or build your own split.
• Filter programs by days per week, equipment and session length, from 20-minute expresses to six-day splits.

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RECOVERY THAT ACTUALLY WORKS
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Most trackers give you one number. STRN models the whole athlete:

• Per-muscle readiness for 12 muscle groups — not a single "recovery score". Your legs can be fried while your upper body is ready.
• CNS fatigue tracking — heavy cleans, deadlifts and sprints tax the same nervous system. STRN knows when you're peaking vs. overreaching.
• Adaptive mesocycle — the 5-week plan auto-adjusts intensity when HRV drops, sleep dips or weekly volume spikes.
• Injury tracker — tap what hurts and STRN swaps out the lifts that load it.
• Cardio feeds the model. A 10k run fatigues quads, hamstrings, calves and core — not just "cardio".

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HYROX, CROSSFIT & HYBRID
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Running and lifting on the same day breaks generic workout trackers. They count your bench press and ignore your 5k. STRN counts both.

• Log WODs alongside strength work — AMRAPs, EMOMs, For Time, chippers and metcons. Time-based exercises sit next to weight × reps in the same session.
• Hyrox race simulations — the full format: 8×1km runs + 8 functional stations, back to back, with pacing targets.
• Every Hyrox station in the exercise library: SkiErg, Sled Push, Sled Pull, Burpee Broad Jumps, Rowing, Farmer's Carry, Sandbag Lunges, Wall Balls.
• Hyrox results lookup — search any athlete's splits from past races and see your fastest and slowest stations side by side.
• Mix modalities in one session: back squat → Echo bike → pull-ups → dumbbell snatches. STRN tracks fatigue across all of them.

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TRACK EVERYTHING ELSE
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• Activity log for running, cycling, climbing, swimming, rowing and HIIT — all feed the recovery model.
• Bodyweight and alcohol tracking, so weekend drinks actually show up in Monday's readiness.

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WEARABLE INTEGRATION
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• Whoop — direct OAuth pulls HRV, recovery, sleep and strain.
• Health Connect (Android) — sleep stages, HRV, resting heart rate and weight. Works with Samsung Health, Oura, Garmin, Fitbit and Polar.
• Workouts are written back to Health Connect so every app on your phone sees your training.

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BUILT ON PRINCIPLE
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• Free. No ads. No paywalls. No upsells.
• Your data is yours. We never sell it, share it with brokers, or train AI models on it. Full export and account deletion from your profile.

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Whether you're chasing a bigger squat, training for your first Hyrox, or just refusing to pick between strength and conditioning, STRN keeps you moving forward without breaking yourself.

Log your first workout. Watch the model learn your fatigue. Train smarter.