1RM Calculator - One Rep Max Apple

1RM Calculator - One Rep Max

Util for estimating max lifts

Features & Capabilities

1RM Calculator helps you determine your 1-rep max by entering the weight you lifted and the reps you performed to see an estimated max. It also lets you compare different rep schemes and track your strength progression over time.

Note: This tool provides estimates. Always warm up and use a spotter for safety. Pro Version includes ad-free usage, saved lifts and history charts, more formulas, multiple maxes (up to 10), lbs/kg switch, and a percentage view from 50% to 125% of your 1RM.

User Growth & Download Statistics

By:
David Bai
Rating:
4.50
(221)
Version:
4.5 Last updated: 2019-05-20
Version code:
831364861
Creation date:
2013-08-10
Compatible devices:
Size:
20.49MB
URLs:
Privacy policy
Full description:
See detailed description
Source:
Apple Apps Store
Data ingested on:
2026-06-06
Compare stats and ranking:

Ranking

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.
Developed by:
David Bai
Apple Apps Store
https://apps.apple.com/us/app/1rm-calculator-one-rep-max/id681279192

User Reviews

Users broadly praise the app for being simple and fast to calculate 1RM and to show quick percentages, making workout planning easier. However, a large portion report paying for the Pro upgrade only to find features not unlocked or the app crashing when accessing paid features. The Pro/paywall presents reliability and usability frustrations, with several calls for ongoing support and updates. Overall, the app delivers a lightweight, straightforward 1RM calculator, but its monetization-linked bugs and stability issues significantly undermine user experience.
Pros
  • Simple, fast to use for calculating 1RM.
  • Provides immediate 1RM value and percentage outputs for quick reference.
  • Useful for planning workouts and tracking progress.
  • Highly regarded as a solid, lightweight max-rep calculator.
Cons
  • Pro upgrade often does not unlock features after payment.
  • Upgrading can cause crashes or make the app unusable when accessing paid features.
  • The free version appears limited and relies on Pro for core functionality (paywall concern).
  • General instability and glitchy behavior reported by users after upgrades.
Recent reviews
For everyone who is having issues with pro not workin, simply click restore purchase on the pro ad screen. 2 stars because this isn’t fixed
by Iz*****, 2024-07-24

I paid for the upgrade but it won’t let me access those features.
by no*****, 2022-08-31

Upgraded to pro for $2 didn’t switch from basic to pro
by Sp*****, 2022-08-15
View all user reviews ›

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