Comparison

One Rep Max vs RM

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

One Rep Max

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.

Highlights
  • Precise 1RM calculations with 7 scientific formulas
  • RPE integration for fine-tuned estimates
  • Custom exercise tracking for any lift
  • Visual progress graphs
  • Percentage charts for training
  • Goal setting and progress monitoring
Features
Read full 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): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

RM

Calculate elevation weights and training times to maximize your efficiency during weight training. Easily switch units by touching them.

Highlights
  • Calculate elevation weights
  • Calculate training times
  • Maximize training efficiency
  • Lean training optimization
  • Unit switching
Features
Read full description

You can calculate elevation weights and times according to your purpose during weight training. Let's maximize efficiency with lean training Touch the unit to change the unit.

Screenshots

One Rep Max4 screens
RM2 screens

Verdict

The call

The clearest difference is rating: One Rep Max at 4.4 against RM's 2.0. One Rep Max also leads on ratings volume (185 vs 1) and update cadence (every 6 days vs monthly). RM's advantage is review sentiment (100% vs 58%) and in-app purchases (none vs 3). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. One Rep Max sells 3 in-app purchases, starting at $2.99 per month. RM asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

One Rep Max holds the better App Store score, 4.4 against 2.0. That said, the two scores are not equally well evidenced: One Rep Max has 185 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 58% of One Rep Max's written reviews are positive against 100% of RM's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

One Rep Max ships an update every 6 days, RM monthly. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard8 real differences · 2 level
One Rep Max versus RM: the parameters behind the verdict, then further details
ParameterOne Rep MaxRM
PriceFreeFree
Rating4.4 (185 ratings) — better2.0 (1 ratings)
Positive reviews58.2% of reviews100.0% of reviews — better
Number of ratings185 — better1
Update frequencyEvery 6 days — betterMonthly
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.010.0 — better
Further details — not scored
Size52 MB22 MB
Age rating4+4+
DeveloperCharles VanderhoffIkki Yoshimiya

Customer experience

One Rep Max

All ratings183 ratings
Positive85.8%
Neutral2.7%
Negative11.5%
Written reviews55 reviews
Positive58.2%
Neutral9.1%
Negative32.7%

RM

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

One Rep Max

Reported bugs

13 issues
  • Features behind paywall
  • Forced ads
  • Deleted lifting history
  • Lost all logs with update
  • Weight limit restriction
Show 8 more
  • Reloads excessively
  • Wonky and now dead
  • Complicated and too much offered
  • Not intuitive for tracking
  • Buggy about dates and lifts
  • Cannot select other lifts
  • Only logs back squats
  • App copying content from clipboard

Requested features

7 requests
  • Allow editing of logs (date/time)
  • Manual entry for weight preferred over slider
  • Include different 1RM formulas (Epley, Brzycki)
  • Ability to create custom graphs
  • Fix weight limit restriction
Show 2 more
  • Allow logging of more than 1073 pounds
  • Update app

RM

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

One Rep Max

Subscriptions2
  • 1RM Pro Monthly$2.991 Month
  • 1RM Pro Annual7 Days trial$19.991 Year
One-time1
  • 1RM Pro Lifetime$49.99
None

RM

No in-app purchases

Questions

Is One Rep Max free?
One Rep Max is free to download, with in-app purchases available.
Is RM free?
RM is free to download, with no in-app purchases.
Which has better reviews, One Rep Max or RM?
One Rep Max is rated higher. One Rep Max averages 4.4 out of 5 from 185 ratings, while RM averages 2.0 from 1 ratings.
Do One Rep Max or RM have ads?
One Rep Max shows ads; RM does not.
Which is updated more often, One Rep Max or RM?
One Rep Max ships an update every 6 days, and RM monthly. Most recently, One Rep Max was updated on October 23, 2026 and RM on October 24, 2026.

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