# 1RM Calculator vs Balrog Strength Systems

The clearest difference is in-app purchases: Balrog Strength Systems at none against 1RM Calculator's 3. Balrog Strength Systems also leads on update cadence (every 2 weeks vs every 4 months). 1RM Calculator's advantage is iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

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

1RM Calculator ships an update every 4 months, Balrog Strength Systems every 2 weeks. The most recent releases landed on September 23, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | 1RM Calculator | Balrog Strength Systems |
| --- | --- | --- |
| 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 | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 32 MB | 74 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Yuri Koshiishi](https://appshunter.io/developer/1566775128) | [Training Point LLC](https://appshunter.io/developer/6805742239) |

## 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 |


### Balrog Strength Systems

[App page](https://appshunter.io/ios/app/balrog-strength-systems/id6767722033)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is 1RM Calculator free?

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

### Is Balrog Strength Systems free?

Balrog Strength Systems is free to download, with no in-app purchases.

### Do 1RM Calculator or Balrog Strength Systems have ads?

Neither 1RM Calculator nor Balrog Strength Systems shows ads.

### Which is updated more often, 1RM Calculator or Balrog Strength Systems?

1RM Calculator ships an update every 4 months, and Balrog Strength Systems every 2 weeks. Most recently, 1RM Calculator was updated on September 23, 2026 and Balrog Strength Systems on September 17, 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.*