RepMax Pro: 1RM Calculator

Calculate your true one-rep max instantly on your wrist with scientifically proven 1RM strength formulas!

RepMax Pro is the ultimate one-rep max (1RM) calculator designed specifically for weightlifters, powerlifters, and fitness enthusiasts who want precise strength estimations directly from their wrist.

Stop guessing your peak lifting capacity. Calculate your estimated 1RM instantly across all major compound exercises using industry-standard formulas including Brzycki, Epley, Lombardi, and Mayhew.

Key Features:

• Instant 1RM Calculation: Enter lifted weight and reps to receive immediate 1RM estimations.
• Multiple Proven Formulas: Compare results from Brzycki, Epley, Lombardi, and Mayhew equations.
• Training Percentage Breakdown: View 95%, 90%, 85%, 80%, and 70% submaximal training weights for smart workout programming.
• Exercise Selection: Tailored presets for Bench Press, Squat, Deadlift, and Overhead Press.
• Log & History: Track personal records and historical max lifts over time.
• Unit Support: Seamless switching between LBS and KG.

HOW TO USE:

1. Open the app on your wrist.
2. Select your target exercise (e.g. Bench Press, Squat, or Deadlift) and weight unit (LBS/KG).
3. Use the plus/minus stepper buttons to set your lifted weight and completed repetitions.
4. Tap Calculate 1RM to view your estimated one-rep maximum and detailed percentage breakdown.
5. Tap Save Record to store the result in your history log.