# 1RM Calculator vs Efort

The clearest difference is in-app purchases: Efort at none against 1RM Calculator's 3. Efort also leads on update cadence (weekly vs every 4 months). 1RM Calculator's advantage is ratings volume (109 vs 15) and device support (3 vs 1). On price, rating, review sentiment and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.9 for 1RM Calculator against 4.8 for Efort. That said, the two scores are not equally well evidenced: 1RM Calculator has 109 ratings behind it against 15, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

1RM Calculator ships an update every 4 months, Efort weekly. The most recent releases landed on September 23, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | 1RM Calculator | Efort |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (109 ratings)](https://appshunter.io/ios/app/1rm-calculator/id1566775126/reviews)** | [4.8 (15 ratings)](https://appshunter.io/ios/app/efort/id6448868299/reviews) |
| Number of ratings | **109** | 15 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 32 MB | 70 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yuri Koshiishi](https://appshunter.io/developer/1566775128) | [EFORT SYSTEMS S.L.](https://appshunter.io/developer/1686726371) |

## 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 |


### Efort

[App page](https://appshunter.io/ios/app/efort/id6448868299)

This application is designed for powerlifting athletes to enhance their performance. It offers custom program creation, performance insights, and optional integration with coaches.

**Highlights:** Custom program creation, Performance insights, Optional coach integration, 100% free

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

**In-app purchases:** none


## Frequently asked questions

### Is 1RM Calculator free?

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

### Is Efort free?

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

### Which has better reviews, 1RM Calculator or Efort?

1RM Calculator is rated higher. 1RM Calculator averages 4.9 out of 5 from 109 ratings, while Efort averages 4.8 from 15 ratings.

### Do 1RM Calculator or Efort have ads?

Neither 1RM Calculator nor Efort shows ads.

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

1RM Calculator ships an update every 4 months, and Efort weekly. Most recently, 1RM Calculator was updated on September 23, 2026 and Efort on September 19, 2026.

---

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