# ExRx.net Workout Tools vs Penlock

The clearest difference is update cadence: ExRx.net Workout Tools at every 2 weeks against Penlock's every 4 months. ExRx.net Workout Tools also leads on iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. ExRx.net Workout Tools sells 2 in-app purchases, starting at $4.99 per month and Penlock sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ExRx.net Workout Tools ships an update every 2 weeks, Penlock every 4 months. The most recent releases landed on October 12, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | ExRx.net Workout Tools | Penlock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (7 ratings)](https://appshunter.io/ios/app/exrxnet-workout-tools/id6463758727/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 4 months |
| Monetization | Freemium | — |
| Size | 38 MB | 20 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ExRx.net, LLC](https://appshunter.io/developer/1674194177) | [PHUC HOANG BACH](https://appshunter.io/developer/1872611539) |

## What reviewers say

### ExRx.net Workout Tools

[App page](https://appshunter.io/ios/app/exrxnet-workout-tools/id6463758727)

Access a comprehensive exercise library with detailed instructions, images, and videos. Calculate one-rep max, adjust workloads, and compare your strength to others. This tool supports offline use for weight room calculators.

**Highlights:** Extensive exercise database, Detailed exercise instructions, Weight room calculators, One-rep max estimation, Strength standards comparison, Offline calculator functionality

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $4.99 | per month |
| Yearly | $39.99 | per year |


### Penlock

[App page](https://appshunter.io/ios/app/penlock-private-journal/id6759357162)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Penlock Lifetime | $7.99 | one-time |


## Frequently asked questions

### Is ExRx.net Workout Tools free?

ExRx.net Workout Tools is free to download, with in-app purchases available.

### Is Penlock free?

Penlock is free to download, with in-app purchases available.

### Do ExRx.net Workout Tools or Penlock have ads?

Neither ExRx.net Workout Tools nor Penlock shows ads.

### Which is updated more often, ExRx.net Workout Tools or Penlock?

ExRx.net Workout Tools ships an update every 2 weeks, and Penlock every 4 months. Most recently, ExRx.net Workout Tools was updated on October 12, 2026 and Penlock on October 22, 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.*