# Protractor+ vs Bubble Level Tool

The clearest difference is monetization model: Protractor+ at free with in-app purchases against Bubble Level Tool's subscription. Protractor+ also leads on review sentiment (15% vs 6%) and ratings volume (10K vs 2.5K). Bubble Level Tool's advantage is update cadence (weekly vs every 2 months) and rating (4.4 vs 4.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Protractor+ sells 1 one-off in-app purchase and Bubble Level Tool sells 9 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Bubble Level Tool holds the better App Store score, 4.4 against 4.1. Both are backed by a comparable volume of ratings — 10K and 2.5K respectively. Written reviews complicate that: 15% of Protractor+'s written reviews are positive against 6% of Bubble Level Tool's, so the app with the better star average is not the one people write more warmly about.

Protractor+ ships an update every 2 months, Bubble Level Tool weekly. Both last shipped on September 22, 2026.

## The numbers

| Metric | Protractor+ | Bubble Level Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (10K ratings)](https://appshunter.io/ios/app/protractor-plus/id631311541/reviews) | **[4.4 (2.5K ratings)](https://appshunter.io/ios/app/bubble-level-tool-digital/id1662018802/reviews)** |
| Number of ratings | **10K** | 2.5K |
| Positive reviews | **14.9% of reviews** | 6.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 21 MB | 5 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tue Nguyen Minh](https://appshunter.io/developer/434811167) | [Rihab Mehboob](https://appshunter.io/developer/1441916319) |

## What reviewers say

### Protractor+

[App page](https://appshunter.io/ios/app/protractor-plus/id631311541)

Transform your device into a versatile angle measurement tool. Easily measure angles in both degrees and radians with an intuitive interface. Ideal for quick and precise angle readings.

**Highlights:** Angle measurement, Degrees and radians, Intuitive visual control, Elegant design, Pocket protractor functionality

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Features | $1.99 | one-time |

**What reviewers like**

- 🚀 Quick angle measurement
- 👍 Useful for physics labs
- 👍 Easy to use

**What reviewers complain about**

- 🔒 Degrees feature locked behind paywall
- 🐛 Unreliable camera feature
- 🔋 Frequent timeouts force upgrade
- 💰 Aggressive monetization tactics

**Reported bugs**

- Camera feature not working as expected
- Angle measurements not accurate
- Frequent app crashes

**Requested features**

- Ability to measure in degrees without upgrade
- Improved accuracy and responsiveness
- Removal of timeouts and paywalls


### Bubble Level Tool

[App page](https://appshunter.io/ios/app/bubble-level-tool-digital/id1662018802)

Measure precise angles and levels with your device. Easily switch between portrait, landscape, and surface level modes. Lock and reset angles for accurate measurements.

**Highlights:** Measure current device angle, Reset angle, Lock angle, Portrait mode, Landscape mode, Surface level

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bubble 1 Week | $3.99 | per 7 days |
| Bubble 1 Week | $4.99 | per 7 days |
| Bubble 1 Month | $5.99 | per month |
| Bubble 1 Month | $9.99 | per month |
| Bubble 1 Year | $24.99 | per year |
| Bubble 6 Months | $29.99 | per 6 months |
| Bubble 1 Year | $39.99 | per year |
| Bubble Lifetime | $17.99 | one-time |
| Bubble Lifetime | $69.99 | one-time |

**What reviewers like**

- ⭐️ Useful app
- 🤠 Handy when needed
- 👍 It simply works

**What reviewers complain about**

- 💰 Expensive subscription
- 🚫 Unusable without paying
- 📢 Constant upsell pop-ups
- 🕰️ Limited free trial
- 🤯 Frustrating experience

**Reported bugs**

- Inaccurate level readings
- Compatibility issues with older devices

**Requested features**

- Percentage slope display option
- Ability to switch between degree and percent
- Refund/cancellation options


## Frequently asked questions

### Is Protractor+ free?

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

### Is Bubble Level Tool free?

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

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

Bubble Level Tool is rated higher. Protractor+ averages 4.1 out of 5 from 10K ratings, while Bubble Level Tool averages 4.4 from 2.5K ratings.

### Do Protractor+ or Bubble Level Tool have ads?

Neither Protractor+ nor Bubble Level Tool shows ads.

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

Protractor+ ships an update every 2 months, and Bubble Level Tool weekly. Most recently, Protractor+ was updated on September 22, 2026 and Bubble Level Tool 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.*