One Rep Max: 1RM Calculator

Charles Vanderhoff · Health & Fitness

4.4 178 ratings Free

Chart standing · US

Not currently charting in this storefront.

What changed · US

Listing changes AppTracker has observed for this app in this storefront — new versions, price moves, rating shifts, and store copy.

Aug 26, 2026
Rating ★ 4.45 → 4.42
Aug 26, 2026
New version 4.0.21 → 4.0.22

Back up your lifts. You can now sign in to securely back up your workout data and keep it synced across all your devices. Plus bug fixes and performance improvements.

Price & rating history · US

Reconstructed from the listing changes AppTracker has observed in this storefront, so each line starts at the first change on record.

Average rating history over the observed period. 4.42 4.43 4.44 4.45 Aug 26 15:40 Aug 27 05:10 Aug 27 18:41 Aug 28 08:12 Aug 28 21:42

Average rating

About

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/

What's new · 4.0.22

Back up your lifts. You can now sign in to securely back up your workout data and keep it synced across all your devices. Plus bug fixes and performance improvements.

Details

ReleasedDec 2014
UpdatedJun 2026
Version4.0.22
Size49.8 MB
RequiresiOS 15.0 or later
Age rating4+
LanguagesDutch, English, French, German, Italian, Japanese, Portuguese, Russian, Turkish
PriceFree
Categories Health & FitnessSports
Bundle IDcom.vandersw.onerep