Best One Rep Max Calculator Apps

249+ iOS apps curated and reviewed

4.2 avg rating
19 free apps
Updated October 2026

Finding the right one rep max calculator apps can be overwhelming with so many options. We've analyzed 249+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top One Rep Max Calculator Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
11RM Calculator1RM CalculatorFree4.9★ (116)NoYesOct 2026
21RM Calculator - One Rep Max1RM Calculator - One Rep MaxFree4.5★ (222)NoYesSep 2026
3One Rep Max: 1RM CalculatorOne Rep Max: 1RM CalculatorFree4.4★ (183)YesYesOct 2026
4My 1 Rep MaxMy 1 Rep MaxFree4.4★ (119)NoYesOct 2026
51 Rep Max Calc1 Rep Max CalcFree4.5★ (11)NoNoSep 2026
6Rep Max CalculatorRep Max CalculatorFree5.0★ (3)NoYesAug 2026
7One Rep Max - 1RM CalculatorOne Rep Max - 1RM CalculatorFree5.0★ (1)NoYesAug 2026
8Simple One-Rep-Max CalculatorSimple One-Rep-Max Calculator$0.994.5★ (2)NoNoOct 2026

Top Picks for One Rep Max Calculator

1RM Calculator#1

1RM Calculator by Yuri Koshiishi

One Rep Max & RPE Calculator
Editor's Choice
💪 Health & Fitness
4.9(116 ratings)
FreeIn-App Purchases
1RM Calculator screenshot 1
1RM Calculator screenshot 2
1RM Calculator screenshot 3
1RM Calculator screenshot 4
1RM Calculator screenshot 5

Easily calculate your one-rep max (1RM) strength with this app. It supports RPE input and allows you to estimate rep maxes based on your 1RM. Track your progress by saving your 1RM history for different exercises.

1RM Calculator - One Rep Max#2

1RM Calculator - One Rep Max by David Bai

Util for estimating max lifts
Strong Contender
💪 Health & Fitness
4.5😞(222 ratings)
FreeIn-App Purchases
1RM Calculator - One Rep Max screenshot 1
1RM Calculator - One Rep Max screenshot 2
1RM Calculator - One Rep Max screenshot 3
1RM Calculator - One Rep Max screenshot 4
1RM Calculator - One Rep Max screenshot 5
1RM Calculator - One Rep Max screenshot 6

Estimate your maximum weight lifted for a single repetition. Input your successful lifts and reps to gauge strength, compare progress, and plan future training. Offers advanced features for detailed tracking and analysis.

What We Love

  • 👍 Simple and easy to use
  • 🚀 Calculates 1 rep max quickly
  • 💡 Helps figure out percentages
  • 👍 Good for tracking routines
  • 👍 Clean design

Room to Improve

  • 🐛 Pro version not working
  • 🐛 Paid features inaccessible
  • 🐛 App crashes after upgrade
  • 🐛 UI needs improvement
  • 🐛 Missing features
  • 🐛 Requires purchase for basic functionality
  • 🐛 Unit conversion costs money
  • 🐛 Can only track one set per day
  • 🐛 Old UI is ugly
One Rep Max: 1RM Calculator#3

One Rep Max: 1RM Calculator by Charles Vanderhoff

Strength Tracker & Gym PR Tool
Worth Considering
💪 Health & Fitness
4.4😞(183 ratings)
FreeAdsIn-App Purchases
One Rep Max: 1RM Calculator screenshot 1
One Rep Max: 1RM Calculator screenshot 2
One Rep Max: 1RM Calculator screenshot 3
One Rep Max: 1RM Calculator screenshot 4
One Rep Max: 1RM Calculator screenshot 5
One Rep Max: 1RM Calculator screenshot 6

Safely estimate your maximum lift potential for various strength exercises using scientific formulas. Track your progress visually, set goals, and fine-tune estimates with perceived exertion. Ideal for powerlifters, CrossFit athletes, and strength enthusiasts.

What We Love

  • 👍 Easy to use interface
  • 📊 Tracks progress with charts
  • ➕ Plate calculator bonus feature
  • 📈 Supports multiple 1RM formulas
  • 💪 Helpful for tracking RMs
  • ✅ Calculates 1RM accurately
  • 🆓 Free to use (historically)
  • ✨ Simple and quick
  • 🚀 Fast and easy
  • 💯 Best 1RM app
  • 💡 Addition of 2-10RM
  • ⚖️ Weightlifting calculator
  • 📈 Graphs for improvements
  • 💯 Accurate calculations
  • ✅ Works as intended
  • 💯 Best 1RM app on iOS
  • 💯 Straight forward
  • 👍 Great for tracking maxes
  • 💯 Very useful as is
  • 💯 Best way to track 1RM
  • 💯 User friendly and accurate
  • 💯 Simple and handy

Room to Improve

  • 💰 Subscription required for features
  • 💸 Features moved behind paywall
  • 😩 Useless without subscription
  • 🚫 Basic features now paid
  • 💸 High subscription cost
  • 😠 Forced ads for basic features
  • 📉 Graphing feature now Pro only
  • 🤔 Unclear what was purchased
  • 💸 Not worth the cost
  • 📉 Deleted lifting history
  • 📉 Lost all logs with update
  • 🚫 Weight limit restriction
  • 📉 Poor interface
  • 🐛 Buggy with dates and lifts
  • 👎 Horribly user-unfriendly
  • 🐛 Reloads excessively
  • 🐛 Wonky and now dead
  • 🐛 Complicated and too much offered
  • 🐛 Not intuitive for tracking
  • 🐛 Buggy about dates and lifts
  • 🐛 Weight limit restriction
  • 🐛 Max weight limit too low
  • 🐛 Not useful for intended audience
  • 🐛 Cannot select other lifts
  • 🐛 Only logs back squats

More One Rep Max Calculator apps to explore

FAQ about One Rep Max Calculator

What are the best one rep max calculator apps for iPhone?
1RM Calculator tops our one rep max calculator apps ranking as of October 2026, with a 4.9-star average from 116 App Store ratings, and it's free to download.
Yes — 19 of the top one rep max calculator apps we rank are free to download, including 1RM Calculator and 1RM Calculator - One Rep Max.
1RM Calculator has no ads and offers in-app purchases, according to its App Store listing as of October 2026.
We track 249+ one rep max calculator apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.