One Rep Max: 1RM Calculator

Strength Tracker & Gym PR Tool

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Discover your max strength potential without risking injury. 7 scientific 1RM formulas, unlimited exercise tracking, and visual progress analytics for serious lifters. Stronger Training, Smarter Progress One Rep Max helps you safely and accurately determine your maximum lift potential for bench press, deadlift, squat, and any other strength exercise - without risking injury. Key Features: • Precise Calculations - 7 scientific formulas for accurate strength predictions: Epley, Brzycki, Lombardi, Mayhew, McGlothin, O'Conner, Wathan • RPE Integration - Factor in Rate of Perceived Exertion to fine-tune your max estimates based on how difficult sets feel • Custom Exercise Tracking - Create and monitor any lift that matters to you • Visual Progress - Beautiful graphs show your strength journey over time • Percentage Charts - Quick reference guide for training percentages • Goal Setting - Set targets and track your path to reaching them Perfect for: • Powerlifters optimizing their training cycles • CrossFit athletes tracking multiple movement patterns • Olympic weightlifters monitoring progress • Strength enthusiasts at any level Advanced Features: • Choose between multiple calculation formulas for different lift types • Track unlimited exercises with custom notes • Rate of Perceived Exertion (RPE) - Fine-tune your 1RM estimates based on how difficult sets feel • Analyze detailed statistics including volume and frequency • Set and monitor progress toward specific strength goals The Science Behind The Numbers: Our app employs multiple validated formulas to estimate your one-rep maximum based on your performance with submaximal weights. This provides you with safe strength targets before attempting potentially risky maximal lifts. Safety Note: Heavy weightlifting should always be performed with proper technique and appropriate spotting. This app provides estimates based on scientific formulas, but individual performance may vary based on experience level and training history. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

  • 4.5
    out of 5
    164 Ratings

Faster PRs and cleaner lifts. The 1RM calculator now runs smoother on iOS 26, with improved charts for tracking bench press, squat, and deadlift progress. Brzycki and RPE-based max lift estimates are more accurate, and the gym log loads faster whether you're powerlifting, doing CrossFit, or barbell training. Keep chasing those max lifts!

The developer, Charles Vanderhoff, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers
  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Health & Fitness
    • Contact Info
    • Identifiers
  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

The developer has not yet indicated which accessibility features this app supports. Learn More

Seller
  • Charles Vanderhoff
Size
  • 42.9 MB
Category
  • Health & Fitness
Compatibility
Requires iOS 15.0 or later.
  • iPhone
    Requires iOS 15.0 or later.
  • iPad
    Requires iPadOS 15.0 or later.
  • iPod touch
    Requires iOS 15.0 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 8 more
  • English, Dutch, French, German, Italian, Japanese, Portuguese, Russian, Turkish
Age Rating
9+
  • 9+
  • Contains
    Advertising
    Health or Wellness Topics
In-App Purchases
Yes
  • 1RM Pro Lifetime $49.99
  • 1RM Pro Monthly $2.99
  • 1RM Pro Annual $19.99
Copyright
  • © 2017-2025 Vandersoft