# Bubble Level for iPhone vs OneEvent

The clearest difference is in-app purchases: OneEvent at none against Bubble Level for iPhone's 8. OneEvent also leads on ads (none vs shown) and rating (5.0 vs 4.6). Bubble Level for iPhone's advantage is ratings volume (112K vs 3). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Bubble Level for iPhone sells 8 in-app purchases, starting at $4.99 per 7 days. OneEvent asks for nothing beyond the download.

OneEvent holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Bubble Level for iPhone has 112K ratings behind it against 3, so its average is the more settled of the two.

Bubble Level for iPhone ships an update every 5 weeks, OneEvent every 3 weeks. The most recent releases landed on October 15, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Bubble Level for iPhone | OneEvent |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (112K ratings)](https://appshunter.io/ios/app/bubble-level-for-iphone/id465613917/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/oneevent/id1144170398/reviews)** |
| Number of ratings | **112K** | 3 |
| Positive reviews | 34.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 104 MB | 275 MB |
| Requires iOS | **13.0** | 14.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lemondo Apps LLc](https://appshunter.io/developer/1131593451) | [OneEvent Technologies Inc.](https://appshunter.io/developer/1144170397) |

## What reviewers say

### Bubble Level for iPhone

[App page](https://appshunter.io/ios/app/bubble-level-for-iphone/id465613917)

This app offers a suite of measurement and detection tools, including a bubble level for alignment, angle measurement, surface flatness checks, and metal detection. It also features an AR ruler for distance measurement and an inclinometer for off-road navigation.

**Highlights:** Bubble level for object alignment, Angle measurement, Surface flatness check, Metal and wire detection, AR ruler for distance measurement, Inclinometer for tilt control, Compass

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly subscription | $4.99 | per 7 days |
| Weekly free trial | $4.99 | per 7 days |
| Monthly subscriptions | $5.99 | per month |
| Bubble Level Pro | $5.99 | per month |
| 3 month | $7.99 | per 3 months |
| 1 Year no free trial | $19.99 | per year |
| 1 Year | $19.99 | per year |
| Remove Ads | $0.99 | one-time |

**What reviewers like**

- 🚀 Handy tool
- 👍 Useful features
- 🚀 Accurate readings
- 👍 Reliable for leveling RVs and caravans

**What reviewers complain about**

- 🐛 Inaccurate readings
- 💩 Constant ads disrupting usage
- 🤑 Paywall for full functionality
- 🐛 Ads still present after paid upgrade

**Reported bugs**

- App freezing/crashing
- Ads blocking access to app features
- Inconsistent performance across devices

**Requested features**

- Calibration option
- Improved contrast for outdoor visibility
- Larger font size for readouts
- Plumb line view through camera


### 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 Bubble Level for iPhone free?

Bubble Level for iPhone 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, Bubble Level for iPhone or OneEvent?

OneEvent is rated higher. Bubble Level for iPhone averages 4.6 out of 5 from 112K ratings, while OneEvent averages 5.0 from 3 ratings.

### Do Bubble Level for iPhone or OneEvent have ads?

Bubble Level for iPhone shows ads; OneEvent does not.

### Which is updated more often, Bubble Level for iPhone or OneEvent?

Bubble Level for iPhone ships an update every 5 weeks, and OneEvent every 3 weeks. Most recently, Bubble Level for iPhone was updated on October 15, 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.*