# 1RM: Weightlifting Calculator — How much can you lift?

> Weightlifting calculator for 1RM percentage breakdowns. (iPhone/iPad app by Jonathan Brodheim.)

- Source: https://appshunter.io/ios/app/1rm-weightlifting-calculator/id1271165235 (this page in markdown: same URL + `.md`)
- Developer: [Jonathan Brodheim](https://appshunter.io/developer/1271165234)
- Category: Health & Fitness, Utilities
- Price: Free
- Rating: 3.00/5 from 4 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.3 · 13 MB
- Languages: American English
- Released: 2017-08-18
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/1rm-weightlifting-calculator/id1271165235/reviews.md

## What is 1RM?

1RM is a simple weightlifting utility, which calculates the percentage breakdown of the total weight entered in nineteen increments, from 95% down to 5%. Next time you workout, you only have to calculate your 1RM breakdown once!

## Key features

- Calculates 1RM percentage breakdown
- Nineteen increments from 95% to 5%
- Simplifies workout planning
- User-friendly interface

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/1rm-weightlifting-calculator/id1271165235/reviews.md

### 5/5 — Does the job

*2019-02-25*

Simple, does what you need it to do for some quick numbers.

### 5/5 — Amazing

*2017-08-18*

Best app ever!!! Super useful and easy to use!

## Frequently asked questions about 1RM

### What is 1RM used for?

1RM is used to calculate the percentage breakdown of your maximum lift. This helps you plan your workouts by knowing the exact weights for different intensity levels.

### How many percentage increments does 1RM provide?

1RM provides nineteen increments, ranging from 95% down to 5% of your total entered weight.

### Is 1RM free to use?

Yes, 1RM is completely free to download and use. It does not have any in-app purchases or advertisements.

### What devices is 1RM available on?

1RM is available for iPhone and iPod devices. It is designed for iOS users looking for a simple weightlifting tool.

### How accurate is 1RM?

1RM is a calculation tool based on the weight you input. Its accuracy depends on the user correctly entering their maximum lift weight.

### When was 1RM last updated?

The latest version of 1RM was released on April 23, 2019. The app was originally released on August 18, 2017.

### What is the age rating for 1RM?

1RM has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.

### Does 1RM have ads?

No, 1RM is ad-free. Users can enjoy the utility without any interruptions from advertisements.

## Version history (last 2 releases)

### 1.1 — 2019-04-23

Updated for iPhone X & iOS 12
Added 100% and 105% options for your 1RM
Made it more obvious when the textfield is active

### 1.0 — 2017-08-18

No release notes.

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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 2026-06-10.*