# Ruler® vs OneEvent

The clearest difference is rating: OneEvent at 5.0 against Ruler®'s 4.3. OneEvent also leads on in-app purchases (none vs 2) and update cadence (every 3 weeks vs every 2 months). Ruler®'s advantage is ratings volume (35K vs 3). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Ruler® sells 2 in-app purchases, starting at $1.99 per 7 days. OneEvent asks for nothing beyond the download.

OneEvent holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Ruler® has 35K ratings behind it against 3, so its average is the more settled of the two.

Ruler® ships an update every 2 months, OneEvent every 3 weeks. The most recent releases landed on October 14, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Ruler® | OneEvent |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (35K ratings)](https://appshunter.io/ios/app/ruler/id623207505/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/oneevent/id1144170398/reviews)** |
| Number of ratings | **35K** | 3 |
| Positive reviews | 21.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 22 MB | 275 MB |
| Requires iOS | 15.0 | **14.5** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tue Nguyen Minh](https://appshunter.io/developer/434811167) | [OneEvent Technologies Inc.](https://appshunter.io/developer/1144170397) |

## What reviewers say

### Ruler®

[App page](https://appshunter.io/ios/app/ruler/id623207505)

This app provides a versatile toolkit for all your measurement needs. It includes a classic ruler, a tape measure, and a camera ruler for precise measurements. Easily switch between units and document your findings by adding measurements directly to photos.

**Highlights:** Classic ruler and tape measure, Camera ruler mode, Photo measures mode, Dual unit support (inches/cm), Precision sliders for small objects, Elegant and user-friendly interface

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ruler Pro (Weekly) | $1.99 | per 7 days |
| Pro Features | $1.99 | one-time |

**What reviewers like**

- 🚀 Accurate measurements
- 👍 Easy to use
- 🔍 Convenient for small items
- 📏 Useful ruler tool

**What reviewers complain about**

- 💰 Paywall for basic features
- ⏱️ Limited free usage time
- 🔍 Inaccurate for larger objects
- 🙅‍♀️ Aggressive monetization tactics

**Reported bugs**

- Inconsistent measurements
- Compatibility issues with newer devices

**Requested features**

- Ability to switch between metric and imperial units without paying
- Improved accuracy for larger measurements
- Removal of time limits on free usage


### OneEvent

[App page](https://appshunter.io/ios/app/oneevent/id1144170398)

Monitor your home, business, or commercial property in real-time from anywhere. Receive timely notifications for potential alarm or warning conditions based on predictive analytics. Manage your system remotely, view sensor readings, and add emergency contacts.

**Highlights:** Real-time property monitoring, Predictive analytic alerts, Remote arm/disarm functionality, Temperature and smoke level readings, Motion and entry activity tracking, Emergency contact management, Multi-user system access

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

**In-app purchases:** none


## Frequently asked questions

### Is Ruler® free?

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

### Is OneEvent free?

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

### Which has better reviews, Ruler® or OneEvent?

OneEvent is rated higher. Ruler® averages 4.3 out of 5 from 35K ratings, while OneEvent averages 5.0 from 3 ratings.

### Do Ruler® or OneEvent have ads?

Neither Ruler® nor OneEvent shows ads.

### Which is updated more often, Ruler® or OneEvent?

Ruler® ships an update every 2 months, and OneEvent every 3 weeks. Most recently, Ruler® was updated on October 14, 2026 and OneEvent on September 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.*