--- title: "One Rep Max: 1RM Calculator - Reviews, Revenue and Downloads in United States | Apple App Store" description: "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 riski" --- # One Rep Max: 1RM Calculator — United States > Strength Tracker & Gym PR Tool ![One Rep Max App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/4e/5d/1e/4e5d1ead-6271-07f6-cfbf-870d9f9cd668/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png) **Developer:** [Charles Vanderhoff](https://apptail.io/developer/charles-vanderhoff-avY) **Category:** Health Fitness **Rating:** 4.5/5 (156 ratings) **Price:** Free **Bundle ID:** com.vandersw.onerep **Store:** Apple App Store **Country:** United States **Version:** 4.0.24 (released 2026-09-29) **Original Release:** 2014-12-30 **Languages:** English, Dutch, French, German, Italian, Japanese, Portuguese, Russian, Turkish **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id950621710) **AppTail Page:** [https://apptail.io/app/one-rep-max-1rm-calculator-Rcg/united-states](https://apptail.io/app/one-rep-max-1rm-calculator-Rcg/united-states) ## One Rep Max Description 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): ## One Rep Max Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/25/fb/41/25fb411c-6f14-9f00-2f86-a8a6aad9fa8c/iPad_1_-_alt.jpg/2064x2752.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/c4/49/54/c4495444-689e-e809-0d9e-11bd08e6bb0e/iPad_2_-_alt.jpg/2064x2752.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/12/d0/bd/12d0bdbe-3adf-37fc-4189-35bd19833c74/iPad_2_-_alt.jpg/2064x2752.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/60/2a/43/602a43bc-5649-07b1-a22b-b07d6d3d8c9a/iPad_3_-_alt.jpg/2064x2752.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/5b/7e/f5/5b7ef57b-0e27-8eb6-33c2-5b5f2295761f/iPad_5_-_alt.jpg/2064x2752.png) ## One Rep Max Rating Breakdown in United States - 5 stars: 123 (79%) - 4 stars: 15 (10%) - 3 stars: 4 (3%) - 2 stars: 2 (1%) - 1 stars: 12 (8%) ## One Rep Max Reviews in United States ### *---- "Functional, but delusional pricing" I’m not paying you $50 for this app. It’s even more insulting you try to turn this into a subscription service. Get a real job. -- BenchpressMaster000, 2026-02-01 ### *---- "Rescinded key features" I purchased this app a few years ago and I’m now blocked from using basic features without being forced to sit through 2 minutes of trash ads because the developer switched to a subscription model. It’s the way most of these apps are going, but it’s still gross. Now looking for an alternative. -- affectedonyx, 2025-12-16 ### ***** "Helpful app & developer!" This app has been extremely helpful for keeping track of my RMs. The developer was also quick to respond to my feedback and implemented some features based on it! I’m happy I can load the plate calculator from my last RM and quickly see which plates I need for a given percentage. Thanks! :) -- sunspotme, 2025-11-19 ### ***** "Top tier" The update to this app is top tier! Love to see the addition of 2-10RM. I’ve used this app for years to make the “math” for adjusting clients (and my own) lifts easy. Easily the best weight lifting calculator on the market. -- hardworkworksfitness, 2025-03-24 ### **--- "Why do I have to upgrade it to pro to log more than 1073 pounds" Please update this app -- $t@#!€¥4857, 2024-03-23 ### ***** "Not to bad" It’s almost accurate just a little off but it’s free and works well -- beushdjfiebndjfbd, 2023-04-10 ### ***** "I bought something and have no idea what I paid for" I bought something and have no idea what I paid for. It said like 3.99 and I have no idea what I clicked but the app is free and great for pushing yourself for that one rep. -- Ash.Cane, 2022-10-05 ### *---- "Not worth it" Awful for Keeping track. Super annoyed I just spent $4 and it doesn’t work -- meganbuddreyes52012, 2022-01-19 ### ***** "5 Stars" It’s accurate and it’s free -- morin34, 2022-01-05 ### *---- "Security concerns" I get notifications occasionally that this app is copying content from my clipboard. -- 2Scoops4Me, 2021-11-30 [View all One Rep Max reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews) ## One Rep Max In-App Purchases | Item | Price | |------|-------| | 1RM Pro Lifetime | $49.99 | | 1RM Pro Monthly | $2.99 | | 1RM Pro Annual | $19.99 | ## One Rep Max Discovered Keywords - rackmath barbell calculator - 1rm - weightlifting calculator - 1rm calculator - the one rep max - one rep max calculator - rep max calculator - fit press - one athletics - rm tracker ## Apps Similar to One Rep Max - [531 Strength](https://apptail.io/app/531-strength-xgi/united-states) - [Bar Is Loaded - Gym Calculator](https://apptail.io/app/bar-is-loaded-gym-calculator-iBP/united-states) - 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