Ruler® vs OneEvent
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ruler®
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.
- 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
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Your Comprehensive Ruler Solution for Your Phone! Experience the ultimate ruler toolkit on your phone, featuring a classic ruler, a tape measure, and a camera ruler. Key Features: - Elegant Design: Enjoy a stylish and user-friendly interface for all your measurement needs. - Dual Units: Easily switch between inches and centimeters for versatile measuring. - Precision Sliders: Accurately measure small objects with intuitive sliders. - Camera Ruler Mode: Utilize your phone's camera to measure objects seamlessly. - Photo Measures Mode: Add measurement data directly to your photos for organized documentation. Make every measurement a breeze with our complete ruler solution! Download now for a sleek and efficient measuring experience. Terms Of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
OneEvent
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.
- 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
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With a OneEvent enabled system from OneEvent Technologies and the OneEvent app, you can monitor your home, business, or other commercial property in real-time from anywhere using your iPhone or iPad. With a OneEvent system installed you will get notified of possible alarm or warning conditions ahead of time based on our predictive analytic algorithms that are continually monitoring your property for you. Note: This app requires a compatible system and an active OneEvent service plan from OneEvent Technologies. Feature availability varies based on system, equipment, and service plan. Visit www.oneeventtechnologies.com for more information. Remote features: • See what’s happening at your property • Arm or disarm your buildings when you are away • Get current and past temperature and smoke level readings • Get current and past motion and door/window entry activity • Add emergency contacts so you can easily contact others in alarm situations • Add other users to your system, so they can use the OneEvent as well • And much more! With OneEvent, you can also receive real-time email and text messages for the specific events that matter to you. Here are some of the notifications you can receive. • Motion in one or more rooms while you are not there • Abnormal temperature (high or low) • Abnormal smoke levels • Sensor being tampered • Sensor has low battery • And much more!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Ruler® | OneEvent |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (35K ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 21.9% of reviews | — |
| Number of ratings | 35K — better | 3 |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 14.5 — better |
| Further details — not scored | ||
| Size | 22 MB | 275 MB |
| Age rating | 4+ | 4+ |
| Developer | Tue Nguyen Minh | OneEvent Technologies Inc. |
Customer experience
Ruler®
OneEvent
Bugs and requests
Ruler®
Reported bugs
2 issues- Inconsistent measurements
- Compatibility issues with newer devices
Requested features
3 requests- Ability to switch between metric and imperial units without paying
- Improved accuracy for larger measurements
- Removal of time limits on free usage
OneEvent
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Ruler®
- Ruler Pro (Weekly)3 Days trial$1.997 Days
- Pro Features$1.99
OneEvent
No in-app purchases









