# 1RM Calculator vs One Rep

The clearest difference is review sentiment: 1RM Calculator at 100% against One Rep's 45%. 1RM Calculator also leads on ads (none vs shown) and device support (3 vs 1). One Rep's advantage is in-app purchases (none vs 3) and update cadence (fortnightly vs every 4 months). On price there is nothing between them.

Both are free to download. 1RM Calculator sells 3 in-app purchases, starting at $1.99 per month. One Rep asks for nothing beyond the download.

1RM Calculator ships an update every 4 months, One Rep fortnightly. The most recent releases landed on September 23, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | 1RM Calculator | One Rep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (109 ratings)](https://appshunter.io/ios/app/1rm-calculator/id1566775126/reviews)** | — |
| Number of ratings | **109** | — |
| Positive reviews | **100.0% of reviews** | 45.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 32 MB | 24 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yuri Koshiishi](https://appshunter.io/developer/1566775128) | [Dylan Ierugan](https://appshunter.io/developer/1574540514) |

## What reviewers say

### 1RM Calculator

[App page](https://appshunter.io/ios/app/1rm-calculator/id1566775126)

Easily calculate your one-rep max (1RM) strength with this app. It supports RPE input and allows you to estimate rep maxes based on your 1RM. Track your progress by saving your 1RM history for different exercises.

**Highlights:** 1RM calculation with RPE, Rep max estimation, Save 1RM history, Customizable exercises, Dark theme

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Rep Max Pro Monthly | $1.99 | per month |
| 1 Rep Max Pro Annual | $9.99 | per year |
| 1 Rep Max Pro Lifetime | $29.99 | one-time |


### One Rep

[App page](https://appshunter.io/ios/app/one-rep/id6479545021)

This minimal gym log app helps you track weightlifting and bodyweight exercises by logging sets and reps quickly. Create custom movements and group them into routines to easily monitor your progress over weeks or months.

**Highlights:** Custom movement creation, Group movements into routines, View workout history (weekly/monthly), Minimalistic UI for quick logging, Track sets and reps

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 1RM Calculator free?

1RM Calculator is free to download, with in-app purchases available.

### Is One Rep free?

One Rep is free to download, with no in-app purchases.

### Do 1RM Calculator or One Rep have ads?

One Rep shows ads; 1RM Calculator does not.

### Which is updated more often, 1RM Calculator or One Rep?

1RM Calculator ships an update every 4 months, and One Rep fortnightly. Most recently, 1RM Calculator was updated on September 23, 2026 and One Rep on September 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*