# Ruler vs LockBox

The clearest difference is rating: LockBox at 5.0 against Ruler's 4.5. LockBox also leads on update cadence (weekly vs every 3 months). Ruler's advantage is in-app purchases (none vs 3) and ratings volume (4 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. LockBox sells 3 one-off in-app purchases. Ruler asks for nothing beyond the download.

LockBox holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Ruler ships an update every 3 months, LockBox weekly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Ruler | LockBox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (4 ratings)](https://appshunter.io/ios/app/ruler-a-simple-ar-ruler-app/id1287068680/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lockbox-encrypted-video-player/id6751835978/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 22 MB | 136 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Play, Inc.](https://appshunter.io/developer/1078526009) | [长松 孙](https://appshunter.io/developer/1626925849) |

## What reviewers say

### Ruler

[App page](https://appshunter.io/ios/app/ruler-a-simple-ar-ruler-app/id1287068680)

This utility app uses augmented reality to measure lengths and areas in the real world. Simply point your device's camera to get accurate measurements.

**Highlights:** Augmented reality measurement, Measure length, Measure area, Simple interface

**Features:** macOS Compatibility

**In-app purchases:** none


### LockBox

[App page](https://appshunter.io/ios/app/lockbox-encrypted-video-player/id6751835978)

Securely encrypt, license, and play videos, images, and PDFs. Protect your digital content with advanced security features and flexible licensing options for creators and businesses.

**Highlights:** Video, image, and PDF encryption, Secure playback up to 8K, Real-time backend decryption, Screen recording protection, Flexible licensing management, Batch encryption and archiving, Membership and e-commerce integration

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1000 coin | $1.99 | one-time |
| 10000 coin | $17.99 | one-time |
| 100000 coin | $149.99 | one-time |


## Frequently asked questions

### Is Ruler free?

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

### Is LockBox free?

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

### Which has better reviews, Ruler or LockBox?

LockBox is rated higher. Ruler averages 4.5 out of 5 from 4 ratings, while LockBox averages 5.0 from 1 ratings.

### Do Ruler or LockBox have ads?

Neither Ruler nor LockBox shows ads.

### Which is updated more often, Ruler or LockBox?

Ruler ships an update every 3 months, and LockBox weekly. Most recently, Ruler was updated on November 3, 2026 and LockBox on October 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.*