The API that turns your users' gym workouts into ready-to-render gamification data. One endpoint. Just integrate and ship.
{
"exercise": "squat",
"gender": "male",
"age": 28,
"weight_unit": "kg",
"sets": [
{ "reps": 5, "weight": 70 },
{ "reps": 5, "weight": 100 },
{ "reps": 5, "weight": 100 }
]
}
From raw workout data to gamification metadata in a single POST request.
POST the exercise name, an array of sets with reps and weight and optionally, for more precise statistics, the athlete gender and age.
We estimate the 1-rep max, map it to established strength standards, and compute a population percentile.
Receive a structured JSON response with strength levels, population percentile, progress to the next level and more — ready to render.
{
"exercise": "squat",
"weight_unit": "kg",
"gender": "male",
"age": 28,
"sets": [
{ "reps": 5, "weight": 70 },
{ "reps": 5, "weight": 100 },
{ "reps": 5, "weight": 100 },
{ "reps": 5, "weight": 100 },
{ "reps": 5, "weight": 100 }
]
}{
"exercise": "squat",
"weight_unit": "kg",
"current_level": {
"label": "intermediate",
"index": 3,
"bw_ratio": 1.50,
"threshold_1rm": 100.0,
},
"estimated_1rm": 112.5,
"percentile": 0.68,
"next_level": {
"label": "advanced",
"index": 4,
"bw_ratio": 2.25,
"threshold_1rm": 140.0,
"weight_gap": 27.5,
"progress": 0.61,
}
}And increase retention. Fast.
The response includes level label, percentile, progress fraction, and gap to next level — structured to display directly in your UI, no transformation needed.
Strength standards evolve. We keep them current. You never touch the underlying data — no research, no updates, no drift.
Coverage across all major lifts with calibrated standards out of the box — no sourcing work on your end.
We provide the credibility that makes gamification work. Our standards are based on millions of real athletes' strength exercise lifts, not arbitrary thresholds.
No accounts, no database, no sessions. Every request is self-contained — ideal for privacy-first apps or edge deployments.
Clean JSON, easy integration. So you can focus on shipping, not building.
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