Free Gym Calculators
The numbers every lifter needs, calculated properly — free, no sign-up, no ads. When you're ready to stop calculating and start tracking automatically, the app takes over.
1RM Calculator
Estimate your one-rep max from any hard set (Epley & Brzycki) plus a full training percentage table.
TDEE Calculator
Your maintenance calories via Mifflin-St Jeor, with cutting and lean-bulk targets.
Macro Calculator
Protein-first daily targets for protein, carbs and fat — goal-aware, with per-meal breakdown.
Plate Calculator
Which plates to load per side for any target weight — kg or lb, with your gym’s plate set.
High-Protein Foods List
Search, sort and filter 70+ foods by protein per 100 g and protein density — meat, fish, dairy, plant and supplements.
Calculators tell you the target. HealthBuddy tracks the reality.
Reps counted from AirPods & Apple Watch, meals scanned by AI, progress charted.
