# Master Lock® cLOTO™ Worker vs Architects Ruler

The clearest difference is in-app purchases: Master Lock® cLOTO™ Worker at none against Architects Ruler's 1. Master Lock® cLOTO™ Worker also leads on device support (3 vs 1) and iOS requirement (14.0 vs 26.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Architects Ruler sells 1 one-off in-app purchase. Master Lock® cLOTO™ Worker asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Master Lock® cLOTO™ Worker | Architects Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/master-lock-cloto-worker/id6503617450/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | — |
| Size | 29 MB | 4 MB |
| Requires iOS | **14.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Master Lock Company, LLC.](https://appshunter.io/developer/417488857) | [Gijs Raggers](https://appshunter.io/developer/1438841415) |

## What reviewers say

### Master Lock® cLOTO™ Worker

[App page](https://appshunter.io/ios/app/master-lock-cloto-worker/id6503617450)

This app digitizes workplace safety procedures, enabling streamlined assignment and tracking of tasks. It provides full traceability and enhances accountability for lockout/tagout programs, improving safety and efficiency.

**Highlights:** Digital lockout/tagout procedures, Assign and track safety tasks, Full traceability of procedures, Enhance workplace safety, Streamline efficiency, Digital audit trail

**Features:** macOS Compatibility

**In-app purchases:** none


### Architects Ruler

[App page](https://appshunter.io/ios/app/architects-ruler/id6755367822)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime scales menu | $0.99 | one-time |


## Frequently asked questions

### Is Master Lock® cLOTO™ Worker free?

Master Lock® cLOTO™ Worker is free to download, with no in-app purchases.

### Is Architects Ruler free?

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

### Do Master Lock® cLOTO™ Worker or Architects Ruler have ads?

Neither Master Lock® cLOTO™ Worker nor Architects Ruler shows ads.

### Which is updated more often, Master Lock® cLOTO™ Worker or Architects Ruler?

Master Lock® cLOTO™ Worker ships an update every 3 months, and Architects Ruler every 3 months. Most recently, Master Lock® cLOTO™ Worker was updated on October 7, 2026 and Architects Ruler on October 24, 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.*