# Bubble Level vs Protractor Angle Measure Tool

The clearest difference is ads: Protractor Angle Measure Tool at none against Bubble Level's shown. Bubble Level's advantage is review sentiment (41% vs 12%) and update cadence (weekly vs monthly). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. Bubble Level sells 11 in-app purchases, starting at $1.99 per 7 days and Protractor Angle Measure Tool sells 4 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.5 for Bubble Level against 4.4 for Protractor Angle Measure Tool. Both are backed by a comparable volume of ratings — 702 and 176 respectively. Written reviews are what separate them: 41% of Bubble Level's written reviews are positive against 12% of Protractor Angle Measure Tool's.

Bubble Level ships an update weekly, Protractor Angle Measure Tool monthly. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Bubble Level | Protractor Angle Measure Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (702 ratings)](https://appshunter.io/ios/app/bubble-level-ar-angle-finder/id1594066382/reviews)** | [4.4 (176 ratings)](https://appshunter.io/ios/app/protractor-angle-measure-tool/id6742701087/reviews) |
| Number of ratings | **702** | 176 |
| Positive reviews | **41.4% of reviews** | 11.8% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 43 MB | 79 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Jens Rieckhof](https://appshunter.io/developer/354266124) | [Appcellent](https://appshunter.io/developer/1870956141) |

## What reviewers say

### Bubble Level

[App page](https://appshunter.io/ios/app/bubble-level-ar-angle-finder/id1594066382)

This app transforms your phone into a precise leveling tool. It offers accurate angle measurement, inclination detection, and augmented reality features for DIY and professional use. Calibration is simple and quick.

**Highlights:** Ultra-precise angle measurement, Inclination and slope meter, Augmented reality ruler and protractor, Effortless one-touch calibration, Clear and easy-to-read display, User-friendly interface

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Weekly Plan | $1.99 | per 7 days |
| Spirit Level Premium – Monthly | $2.99 | per month |
| Bubble Level Premium - Weekly | $2.99 | per 7 days |
| Bubble Level Premium - Monthly | $5.99 | per month |
| Spirit Level Premium – Annual | $14.99 | per year |
| Bubble Level Premium - Annual | $19.99 | per year |
| All features - No ads | $1.99 | one-time |
| Unlock all AR features | $5.99 | one-time |
| Discount Lifetime Premium | $14.99 | one-time |
| Bubble Level PREMIUM Lifetime | $19.99 | one-time |
| Bubble Level - Lifetime Premium | $29.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🔍 Accurate angle measurements
- 🛠️ Helpful for various tasks (telescopes, leveling, etc.)

**What reviewers complain about**

- 🤑 Expensive ad removal
- 🤖 Unreliable calibration
- 💤 Constant interruptions and ads
- 🚫 Unusable due to ads

**Reported bugs**

- App crashes on launch
- Measurement point behaves erratically

**Requested features**

- Ability to calibrate the app
- Option to change the display color


### Protractor Angle Measure Tool

[App page](https://appshunter.io/ios/app/protractor-angle-measure-tool/id6742701087)

This tool transforms your device into a precise angle measurement instrument. It's ideal for DIY projects, construction, and renovations, offering real-time readings in various formats. Get professional-grade accuracy for all your angled surface needs.

**Highlights:** Precise angle measurement, Vertical and horizontal orientations, Multiple measurement units (degrees, radians, gradians), Target angle alerts with audio/vibration, Real-time precision readings, Apple Watch support with haptic feedback

**Features:** Apple Watch app

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Protractor Weekly | $4.99 | per 7 days |
| Protractor Weekly with Trial | $6.99 | per 7 days |
| Protractor Weekly with Trial | $8.99 | per 7 days |
| Protractor Annual | $39.99 | per year |


## Frequently asked questions

### Is Bubble Level free?

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

### Is Protractor Angle Measure Tool free?

Protractor Angle Measure Tool is free to download, with in-app purchases available.

### Which has better reviews, Bubble Level or Protractor Angle Measure Tool?

Bubble Level is rated higher. Bubble Level averages 4.5 out of 5 from 702 ratings, while Protractor Angle Measure Tool averages 4.4 from 176 ratings.

### Do Bubble Level or Protractor Angle Measure Tool have ads?

Bubble Level shows ads; Protractor Angle Measure Tool does not.

### Which is updated more often, Bubble Level or Protractor Angle Measure Tool?

Bubble Level ships an update weekly, and Protractor Angle Measure Tool monthly. Most recently, Bubble Level was updated on October 7, 2026 and Protractor Angle Measure Tool on October 12, 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.*