# One Rep Max vs Rep Max Calculator

The clearest difference is rating: Rep Max Calculator at 5.0 against One Rep Max's 4.4. Rep Max Calculator also leads on ads (none vs shown) and review sentiment (80% vs 58%). One Rep Max's advantage is update cadence (every 6 days vs every 7 months) and ratings volume (185 vs 3). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. One Rep Max sells 3 in-app purchases, starting at $2.99 per month and Rep Max Calculator sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Rep Max Calculator holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: One Rep Max has 185 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 58% of One Rep Max's written reviews are positive against 80% of Rep Max Calculator's.

One Rep Max ships an update every 6 days, Rep Max Calculator every 7 months. The most recent releases landed on October 23, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | One Rep Max | Rep Max Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (185 ratings)](https://appshunter.io/ios/app/one-rep-max-1rm-calculator/id950621710/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/rep-max-calculator/id1103321723/reviews)** |
| Number of ratings | **185** | 3 |
| Positive reviews | 58.2% of reviews | **80.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 6 days** | Every 7 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 52 MB | 28 MB |
| Requires iOS | 15.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Charles Vanderhoff](https://appshunter.io/developer/950621709) | [Roman Shimchenko](https://appshunter.io/developer/916564826) |

## What reviewers say

### One Rep Max

[App page](https://appshunter.io/ios/app/one-rep-max-1rm-calculator/id950621710)

Safely estimate your maximum lift potential for various strength exercises using scientific formulas. Track your progress visually, set goals, and fine-tune estimates with perceived exertion. Ideal for powerlifters, CrossFit athletes, and strength enthusiasts.

**Highlights:** Precise 1RM calculations with 7 scientific formulas, RPE integration for fine-tuned estimates, Custom exercise tracking for any lift, Visual progress graphs, Percentage charts for training, Goal setting and progress monitoring

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1RM Pro Monthly | $2.99 | per month |
| 1RM Pro Annual | $19.99 | per year |
| 1RM Pro Lifetime | $49.99 | one-time |

**What reviewers like**

- 👍 Easy to use interface
- 📊 Tracks progress with charts
- ➕ Plate calculator bonus feature
- 📈 Supports multiple 1RM formulas
- 💪 Helpful for tracking RMs

**What reviewers complain about**

- 💰 Subscription required for features
- 💸 Features moved behind paywall
- 😩 Useless without subscription
- 🚫 Basic features now paid
- 💸 High subscription cost

**Reported bugs**

- Features behind paywall
- Forced ads
- Deleted lifting history
- Lost all logs with update
- Weight limit restriction

**Requested features**

- Allow editing of logs (date/time)
- Manual entry for weight preferred over slider
- Include different 1RM formulas (Epley, Brzycki)
- Ability to create custom graphs
- Fix weight limit restriction


### Rep Max Calculator

[App page](https://appshunter.io/ios/app/rep-max-calculator/id1103321723)

Calculate your maximum weight for a specific number of repetitions. Ideal for powerlifting, bodybuilding, and fitness enthusiasts, it supports calculations for 1 to 40 repetitions based on the weight lifted.

**Highlights:** Calculate 1-rep max, Supports 1-40 repetitions, Weight-based calculation, Powerlifting, bodybuilding, fitness, User-friendly interface

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $9.99 | per month |
| Subscription for year | $99.99 | per year |
| Save Settings | $1.99 | one-time |


## Frequently asked questions

### Is One Rep Max free?

One Rep Max is free to download, with in-app purchases available.

### Is Rep Max Calculator free?

Rep Max Calculator is free to download, with in-app purchases available.

### Which has better reviews, One Rep Max or Rep Max Calculator?

Rep Max Calculator is rated higher. One Rep Max averages 4.4 out of 5 from 185 ratings, while Rep Max Calculator averages 5.0 from 3 ratings.

### Do One Rep Max or Rep Max Calculator have ads?

One Rep Max shows ads; Rep Max Calculator does not.

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

One Rep Max ships an update every 6 days, and Rep Max Calculator every 7 months. Most recently, One Rep Max was updated on October 23, 2026 and Rep Max Calculator on September 30, 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.*