# Clinometer Bubble Level vs Protractor Edge

The clearest difference is rating: Protractor Edge at 4.5 against Clinometer Bubble Level's 3.9. Protractor Edge also leads on review sentiment (70% vs 40%). Clinometer Bubble Level's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, ratings volume, update cadence and device support there is nothing between them.

Both are free to download. Protractor Edge sells 2 in-app purchases, starting at $1.99 per year. Clinometer Bubble Level asks for nothing beyond the download.

Protractor Edge holds the better App Store score, 4.5 against 3.9. Both are backed by a comparable volume of ratings — 58 and 55 respectively. Written reviews point the same way: 40% of Clinometer Bubble Level's written reviews are positive against 70% of Protractor Edge's.

Clinometer Bubble Level ships an update every 49 months, Protractor Edge every 43 months. The most recent releases landed on September 14, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Clinometer Bubble Level | Protractor Edge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (58 ratings)](https://appshunter.io/ios/app/clinometer-bubble-level/id1151262593/reviews) | **[4.5 (55 ratings)](https://appshunter.io/ios/app/protractor-edge-clinometer/id1198499762/reviews)** |
| Number of ratings | **58** | 55 |
| Positive reviews | 40.0% of reviews | **69.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 49 months | **Every 43 months** |
| Monetization | **Free** | Freemium |
| Size | 24 MB | 21 MB |
| Requires iOS | 9.0 | 9.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [齐 陈](https://appshunter.io/developer/455625305) | [嵩 张](https://appshunter.io/developer/1091921941) |

## What reviewers say

### Clinometer Bubble Level

[App page](https://appshunter.io/ios/app/clinometer-bubble-level/id1151262593)

Measure angles and surface flatness with this easy-to-use tool. Ideal for home decoration, aligning pictures, and calculating slopes or pitches. Features calibration and a hold option for convenience.

**Highlights:** Angle measurement, Surface flatness measurement, Calibration, Hold option, Auto fade unused level, Number indicators for angles

**Features:** macOS Compatibility

**In-app purchases:** none


### Protractor Edge

[App page](https://appshunter.io/ios/app/protractor-edge-clinometer/id1198499762)

Measure angles directly on your device without taking photos or placing the angle on screen. This app offers a unique and efficient way to determine degrees, saving you time with its handy assistant functionality.

**Highlights:** Direct angle measurement on device, Intuitive line dragging interface, Measures angles in photos (Premium), Measures from camera view (Premium), Ad-free experience (Premium)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $1.99 | per year |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is Clinometer Bubble Level free?

Clinometer Bubble Level is free to download, with no in-app purchases.

### Is Protractor Edge free?

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

### Which has better reviews, Clinometer Bubble Level or Protractor Edge?

Protractor Edge is rated higher. Clinometer Bubble Level averages 3.9 out of 5 from 58 ratings, while Protractor Edge averages 4.5 from 55 ratings.

### Do Clinometer Bubble Level or Protractor Edge have ads?

Protractor Edge shows ads; Clinometer Bubble Level does not.

### Which is updated more often, Clinometer Bubble Level or Protractor Edge?

Clinometer Bubble Level ships an update every 49 months, and Protractor Edge every 43 months. Most recently, Clinometer Bubble Level was updated on September 14, 2026 and Protractor Edge on September 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.*