# BACDoor™ vs Protractor for Angle Measuring

The clearest difference is rating: Protractor for Angle Measuring at 4.5 against BACDoor™'s 3.5. Protractor for Angle Measuring also leads on update cadence (every 2 weeks vs every 4 months) and ratings volume (1K vs 6). BACDoor™'s advantage is in-app purchases (none vs 5) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Protractor for Angle Measuring sells 5 in-app purchases, starting at $0.99 per 7 days. BACDoor™ asks for nothing beyond the download.

Protractor for Angle Measuring holds the better App Store score, 4.5 against 3.5. That said, the two scores are not equally well evidenced: Protractor for Angle Measuring has 1K ratings behind it against 6, so its average is the more settled of the two.

BACDoor™ ships an update every 4 months, Protractor for Angle Measuring every 2 weeks. The most recent releases landed on June 1, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | BACDoor™ | Protractor for Angle Measuring |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (6 ratings)](https://appshunter.io/ios/app/bacdoor/id1229140415/reviews) | **[4.5 (1K ratings)](https://appshunter.io/ios/app/protractor-for-angle-measuring/id6474609160/reviews)** |
| Number of ratings | 6 | **1K** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 92 MB | 112 MB |
| Requires iOS | **8.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Accelerated Systems Inc.](https://appshunter.io/developer/1229140414) | [AppLiks Sp. z O.O.](https://appshunter.io/developer/1804335622) |

## What reviewers say

### BACDoor™

[App page](https://appshunter.io/ios/app/bacdoor/id1229140415)

This utility app allows ASI customers with a support account to fine-tune Bluetooth controllers directly from their mobile device. It offers features like parameter adjustment, file management, firmware updates, and data logging without needing a PC connection.

**Highlights:** Poll and adjust controller parameters, Upload and save parameter files, Bootload firmware to controllers, Datalog parameters, Customizable app layouts

**Features:** macOS Compatibility

**In-app purchases:** none


### Protractor for Angle Measuring

[App page](https://appshunter.io/ios/app/protractor-for-angle-measuring/id6474609160)

Transform your iPhone into a precision angle measuring tool. Easily measure angles in real-time using touch or camera modes, and even analyze angles in existing photos. Customize your tools for a seamless experience.

**Highlights:** Real-time angle measurement, Touch and camera modes, Measure angles in photos, Simultaneous unlimited angle measurement, Tool color customization, Plumb bob pendulum for tilt

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $0.99 | per 7 days |
| Weekly Access with Trial | $1.99 | per 7 days |
| Weekly Access | $1.99 | per 7 days |
| Yearly Access | $3.99 | per year |
| Yearly Access | $4.99 | per year |

**What reviewers like**

- 👍 Useful for surveying and measuring angles
- 💡 Interesting use of camera to overlay protractor
- 👍 Helps with specific use cases like golf setup
- 👍 Provides a clutter-free protractor experience

**What reviewers complain about**

- 🐛 Difficulty using the protractor tool and angle measurement
- 🐛 Inability to zoom in/out when measuring angles in photos
- 🐛 Inaccurate angle measurements in some cases

**Reported bugs**

- Protractor tool is hard to use and requires multiple tries
- Angle measurements do not match real-world angles

**Requested features**

- Add more instructions and guidance for using the protractor tool
- Improve the zoom functionality when measuring angles in photos
- Enhance the accuracy of angle measurements


## Frequently asked questions

### Is BACDoor™ free?

BACDoor™ is free to download, with no in-app purchases.

### Is Protractor for Angle Measuring free?

Protractor for Angle Measuring is free to download, with in-app purchases available.

### Which has better reviews, BACDoor™ or Protractor for Angle Measuring?

Protractor for Angle Measuring is rated higher. BACDoor™ averages 3.5 out of 5 from 6 ratings, while Protractor for Angle Measuring averages 4.5 from 1K ratings.

### Do BACDoor™ or Protractor for Angle Measuring have ads?

Protractor for Angle Measuring shows ads; BACDoor™ does not.

### Which is updated more often, BACDoor™ or Protractor for Angle Measuring?

BACDoor™ ships an update every 4 months, and Protractor for Angle Measuring every 2 weeks. Most recently, BACDoor™ was updated on June 1, 2026 and Protractor for Angle Measuring on September 30, 2026.

---

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