# Simple One-Rep-Max Calculator — user reviews

> 2 indexed App Store user reviews of Simple One by Above AS, rated 4.50/5 from 2 ratings.

- Source: https://appshunter.io/ios/app/simple-one-rep-max-calculator/id1191599672/reviews
- App overview in markdown: https://appshunter.io/ios/app/simple-one-rep-max-calculator/id1191599672.md
- Rating breakdown: 5★ 1 · 4★ 1 · 3★ 0 · 2★ 0 · 1★ 0

## Most critical reviews (2 lowest-rated)

### 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.

### 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!

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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 2026-08-22.*