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.
Sign up in seconds and get your API key. No payment or credit card required.
Send a POST request with your users' workout data.
Receive a response with strength levels, population percentile, progress and more — based on established strength standards and 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
}
}
Increasing retention and engagement. Fast.
The response includes structured data that can be displayed directly in your UI with minimal 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.
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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