# Bubble Level vs Protractor°

The clearest difference is rating: Protractor° at 5.0 against Bubble Level's 1.0. Protractor° also leads on update cadence (every 2 days vs monthly) and monetization model (free vs free with in-app purchases). Bubble Level's advantage is iOS requirement (17.0 vs 26.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Bubble Level sells 3 in-app purchases, starting at $4.99 per 7 days and Protractor° sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Protractor° holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Bubble Level ships an update monthly, Protractor° every 2 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Bubble Level | Protractor° |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/bubble-level-angle-finder/id6772273713/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/protractor-angle-finder/id6822147049/reviews)** |
| Number of ratings | 1 | 1 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 13 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Phuc Pham](https://appshunter.io/developer/1893081423) | [Just2us Pte Ltd](https://appshunter.io/developer/293971188) |

## What reviewers say

### Bubble Level

[App page](https://appshunter.io/ios/app/bubble-level-angle-finder/id6772273713)

This app acts as a digital tool to measure angles and levels on your phone. It provides precise readings for verticality, flatness, and slopes in various units, helping you achieve accurate results for DIY projects and professional tasks.

**Highlights:** Digital plumb bob for true vertical checks, Two-axis surface level for flatness, Angle measurement in degrees, percent grade, and roof pitch, Hold function to freeze readings, Timestamped log of measurements, Fine calibration for accuracy

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bubble Gauge Weekly | $4.99 | per 7 days |
| Slope Finder Yearly | $24.99 | per year |
| Angle Meter, Pay Once | $49.99 | one-time |


### Protractor°

[App page](https://appshunter.io/ios/app/protractor-angle-finder/id6822147049)

This app transforms your iPhone Duo into a digital protractor. Measure angles on paper or between surfaces by simply folding the device to match the desired angle and reading the degrees. Save and organize your measurements for later use.

**Highlights:** Measure angles on paper, Measure angles between surfaces, Uses iPhone Duo's folding hinge, Record and save angle readings, Organize measurements by date

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Protractor Lifetime Access | $3.99 | one-time |


## Frequently asked questions

### Is Bubble Level free?

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

### Is Protractor° free?

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

### Which has better reviews, Bubble Level or Protractor°?

Protractor° is rated higher. Bubble Level averages 1.0 out of 5 from 1 ratings, while Protractor° averages 5.0 from 1 ratings.

### Do Bubble Level or Protractor° have ads?

Neither Bubble Level nor Protractor° shows ads.

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

Bubble Level ships an update monthly, and Protractor° every 2 days. Most recently, Bubble Level was updated on October 31, 2026 and Protractor° on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*