# Simple One-Rep-Max Calculator — Calculate your 1RM like a pro!

> Calculates one-rep max (1RM) using multiple formulas for strength training. (iPhone/iPad app by Above AS.)

- Source: https://appshunter.io/ios/app/simple-one-rep-max-calculator/id1191599672 (this page in markdown: same URL + `.md`)
- Developer: [Above AS](https://appshunter.io/developer/894620418)
- Category: Health & Fitness
- Price: $0.99
- Rating: 4.50/5 from 2 App Store ratings · 2 written reviews indexed
- Age rating: 17+
- Requires: iOS 16.0 · 2 MB
- Languages: American English
- Released: 2017-01-06
- Data updated: 2026-08-22
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/simple-one-rep-max-calculator/id1191599672/reviews.md

## What is Simple One?

Stop guessing your max. Train with confidence.

Simple One Rep Max Calculator helps you understand how strong you really are — so every workout has a purpose. By calculating your one-rep max using multiple proven formulas, you get realistic numbers you can trust, not just a single estimate.

Know your limits, choose the right weights, and progress safely — whether you’re pushing for new PRs or building strength over time.

Why you’ll love it
• Clear and reliable max lift estimates
• Multiple formulas for better confidence
• Training weights at the right intensity
• Fast, simple, and distraction-free

Less guessing.
Better progress.

## Key features

- Accurate one-rep max estimates
- Multiple proven calculation formulas
- Determine training weights
- Fast and simple interface
- Distraction-free design

## Chart rankings

- #197 in Top Paid · Health & Fitness (US App Store)

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/simple-one-rep-max-calculator/id1191599672/reviews.md

### 5/5 — Simple, accurate, easy to use, free

*2021-01-26*

The work out tracker I use doesn’t have a max rep calculator built in so I wanted one as a stand alone app.

As I switch between volume and strength based workout routines, this helps calibrate the weight I should be using for the new rep ranges.

The app is super easy to use, it’s free, doesn’t ask for weird permissions or anything, and will show you the estimated max weight for a range of repetitions (12 - 1 rep) for any input weight and rep. 

The other review giving one star is super odd. Rep max calculations aren’t accurate if you have a higher rep range, as this is testing muscle endurance and stamina above strength. Hence, the app shows the rep max for rep ranges of 1 to 12 only. 

This app works as described and is free while others are trying to charge for this feature. 

Recommended.

**Developer response:** What a great and hones review, Haheiesbsjow. Thank you!

### 1/5 — No

*2017-05-07*

Won't let user input more than 12 reps. Must load weights to a potential unsafe load to calculate 1RM

**Developer response:** If you have to perform 12+ reps to calculate your 1RM this calculator is not one of your problems.

## Frequently asked questions about Simple One

### What is the price of Simple One-Rep-Max Calculator?

Simple One-Rep-Max Calculator is a paid app priced at $0.99. This one-time purchase grants you access to all its features.

### Does Simple One-Rep-Max Calculator have ads?

No, Simple One-Rep-Max Calculator is ad-free. You can use the app without any interruptions from advertisements.

### What devices does Simple One-Rep-Max Calculator support?

Simple One-Rep-Max Calculator is currently supported on iPhone devices.

### How often is Simple One-Rep-Max Calculator updated?

The app was last updated on January 18, 2026, indicating ongoing support and potential for future improvements. It was initially released on January 6, 2017.

### What is the age rating for Simple One-Rep-Max Calculator?

Simple One-Rep-Max Calculator has an age rating of 17+. This is likely due to its focus on adult fitness and strength training.

### What formulas does Simple One-Rep-Max Calculator use?

The app utilizes multiple proven formulas to calculate your one-rep max, offering greater confidence in the estimates provided.

### Can Simple One-Rep-Max Calculator help me choose workout weights?

Yes, by providing accurate 1RM estimates, the app helps you determine the right weights for your training intensity and safely progress your strength.

### What is the user sentiment for Simple One-Rep-Max Calculator?

Based on the available rating, Simple One-Rep-Max Calculator has a 4.0-star rating from one review, suggesting a positive initial reception.

## Version history (last 5 releases)

### 2.1.0 — 2026-01-18

More clarity. More confidence. Better numbers.

You can now calculate your one-rep max using multiple proven formulas, giving you a clearer picture of your true strength instead of relying on a single estimate.

### 2.0.0 — 2025-01-10

We’ve been hitting the development gym and rewritten the entire app from scratch—now built with SwiftUI! Sleeker, faster, and ready to help you lift smarter.

### 1.0.2 — 2018-02-12

This app has been updated by Apple to display the Apple Watch app icon.

- Just a simple update here!

### 1.0.1 — 2017-01-12

First of all, Hi and thanks for downloading this project of mine. 

In this version I did the following changes: 

- Changed the view to be scrollable all the way (not just only the percentage values)
- Added support for up to 12 reps. (up from 10).
- A few changes in the design.

### 1.0 — 2017-01-05

No release notes.

## Apps similar to Simple One

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [One Rep Max: 1RM Calculator](https://appshunter.io/ios/app/one-rep-max-1rm-calculator/id950621710) | 4.4 (178) | Free | Health & Fitness |
| [Fitness Challenge Tracker](https://appshunter.io/ios/app/fitness-challenge-tracker/id1481461808) | 5.0 (7) | $0.99 | Health & Fitness |
| [Barbell Plate Calculator](https://appshunter.io/ios/app/barbell-plate-calculator/id1468808885) | 4.8 (236) | Free | Health & Fitness |
| [531 Strength](https://appshunter.io/ios/app/531-strength/id1062989244) | 4.9 (11,290) | Free | Health & Fitness |
| [JuggernautAI](https://appshunter.io/ios/app/juggernautai/id1515756471) | 4.8 (5,654) | Free | Health & Fitness |
| [KeyLifts - 531 Workout Log](https://appshunter.io/ios/app/keylifts-531-workout-log/id1437949461) | 4.8 (833) | Free | Health & Fitness |

## More apps by Above AS

- [Ladeklar](https://appshunter.io/ios/app/ladeklar/id917331988)
- [Nutrimo - Næringsinnhold](https://appshunter.io/ios/app/nutrimo-nringsinnhold/id918088318)
- [The Svalbard Guide](https://appshunter.io/ios/app/the-svalbard-guide/id955901008)
- [Flac Music Player: Soundlight](https://appshunter.io/ios/app/flac-music-player-soundlight/id1084239863)
- [Relaxing Sounds: Daydream](https://appshunter.io/ios/app/relaxing-sounds-daydream/id1163892663)
- [Walk With Foxy: Step Counter](https://appshunter.io/ios/app/walk-with-foxy-step-counter/id1173367009)

All apps by Above AS: https://appshunter.io/developer/894620418

---

*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 2026-08-22.*