# 1RM Percentage Calculator — Percentage-Based Workout Util

> Calculate percentage-based workout sets and estimate one-rep max. (iPhone/iPad app by Jonathan McDill.)

- Source: https://appshunter.io/ios/app/1rm-percentage-calculator/id6451496905 (this page in markdown: same URL + `.md`)
- Developer: [Jonathan McDill](https://appshunter.io/developer/1698564299)
- Category: Health & Fitness, Utilities
- Price: Free with in-app purchases
- Rating: 5.00/5 from 3 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.1 · 33 MB
- Languages: American English
- Released: 2023-07-28
- Data updated: 2026-06-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/1rm-percentage-calculator/id6451496905/reviews.md

## What is 1RM Percentage Calculator?

1RM Percentage Calculator helps you set up and calculate your percentage based workouts. With custom percentages for ultimate control! Once you set up your percentages, easily view your calculated reps for each set in your workout. Use the integrated 1RM calculator to get an estimate of your one rep max. You can fully customize your plate weights and barbell. This utility allows you to easily set up your workouts without all the math!  

Main Features:
- Percentage based workout sets calculator
- Automatic plating algorithm 
- One rep max estimate calculator (Brzycki formula)
- Customizable weights

** UNLOCKED Version Features **
- Unlimited sets
- Keep track of reps for each set
- Convenient scroller to move through your sets one at a time 
- Barbell plating helper with graphic
- Themes

## Key features

- Percentage-based workout sets calculator
- One rep max estimate calculator
- Customizable plate weights
- Automatic plating algorithm
- Track reps for each set
- Barbell plating helper

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 1RM & Sets Calculator | $2.99 | one-time |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/1rm-percentage-calculator/id6451496905/reviews.md

### 5/5 — Extremely Helpful

*2026-01-16*

For someone like me who is math challenged, this app is a dream. I love that it will calculate percentages right in the app for me, and my FAVORITE part is the plates guide!! I feel like that science lady meme in the gym trying to figure out which plates I need to put on my bar to add up to the right weight, but this makes it all smooth and confident (even if I still struggle to get the collar off the bar at times, lol).

### 5/5 — RM

*2026-01-16*

Keeps me on track!

## Frequently asked questions about 1RM Percentage Calculator

### What is the 1RM Percentage Calculator used for?

1RM Percentage Calculator is used to help you set up and calculate percentage-based workouts. It also includes a one-rep max estimator and allows for custom weight settings.

### Does 1RM Percentage Calculator have ads?

No, the 1RM Percentage Calculator does not contain advertisements. It is a free app with optional in-app purchases for unlocked features.

### What is the rating of 1RM Percentage Calculator?

1RM Percentage Calculator has a high rating of 5.0 stars based on 3 user reviews.

### What devices is 1RM Percentage Calculator available on?

1RM Percentage Calculator is available for iPhone and iPod devices.

### How often is 1RM Percentage Calculator updated?

The latest version of 1RM Percentage Calculator is 2.0, last updated on January 13, 2026. This indicates a recent update, suggesting ongoing support.

### What are the main features of the UNLOCKED version of 1RM Percentage Calculator?

The UNLOCKED version of 1RM Percentage Calculator offers unlimited sets, tracking of reps for each set, a convenient scroller, a barbell plating helper with graphics, and themes.

### What age rating does 1RM Percentage Calculator have?

1RM Percentage Calculator has an age rating of 4+, making it suitable for a wide range of users.

### What formula does 1RM Percentage Calculator use for its one rep max estimate?

1RM Percentage Calculator uses the Brzycki formula to estimate your one rep max.

## Version history (last 2 releases)

### 2.0 — 2026-01-13

- All new design!
- Ability to save and load workouts
- Custom plate weight management
- KG/LB selector
- Themes for unlocked version
- Bugfixes

### 1.0 — 2023-07-28

No release notes.

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## Related topics

[1rm percentage calculator](https://appshunter.io/ios/topics/1rm-percentage-calculator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*