# Anchor Alarm vs Protractor for Angle Measuring

The clearest difference is review sentiment: Anchor Alarm at 100% against Protractor for Angle Measuring's 48%. Anchor Alarm also leads on ads (none vs shown) and monetization model (free vs free with in-app purchases). Protractor for Angle Measuring's advantage is rating (4.5 vs 4.0) and ratings volume (1.1K vs 11). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Anchor Alarm sells 1 in-app purchase, starting at $2.99 per month and Protractor for Angle Measuring sells 5 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Protractor for Angle Measuring holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: Protractor for Angle Measuring has 1.1K ratings behind it against 11, so its average is the more settled of the two. Written reviews complicate that: 100% of Anchor Alarm's written reviews are positive against 48% of Protractor for Angle Measuring's, so the app with the better star average is not the one people write more warmly about.

Anchor Alarm ships an update every 2 weeks, Protractor for Angle Measuring every 3 weeks. The most recent releases landed on November 3, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | Anchor Alarm | Protractor for Angle Measuring |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (11 ratings)](https://appshunter.io/ios/app/anchor-alarm-boat-tracker/id6448241324/reviews) | **[4.5 (1.1K ratings)](https://appshunter.io/ios/app/protractor-for-angle-measuring/id6474609160/reviews)** |
| Number of ratings | 11 | **1.1K** |
| Positive reviews | **100.0% of reviews** | 48.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 18 MB | 120 MB |
| Requires iOS | **16.0** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Serdar Percin](https://appshunter.io/developer/1143186597) | [AppLiks Sp. z O.O.](https://appshunter.io/developer/1804335622) |

## What reviewers say

### Anchor Alarm

[App page](https://appshunter.io/ios/app/anchor-alarm-boat-tracker/id6448241324)

This app provides real-time updates on your anchor's location and sends instant notifications if it drifts beyond set parameters. It offers detailed stay analysis, location tracking, and a history of anchoring trips, all within a user-friendly interface.

**Highlights:** Real-time anchor location updates, Instant drift notifications, Customizable distance and time settings, Detailed anchor stay analysis, Location history tracking, Anchor trip history, User-friendly interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $2.99 | per month |


### Protractor for Angle Measuring

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

Transform your iPhone into a precision angle measurement tool. Effortlessly assess angles in real-time using touch and camera modes, measure multiple angles simultaneously, and customize your tools for accuracy and simplicity. Ideal for quick, reliable on-the-go assessments.

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

**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 Anchor Alarm free?

Anchor Alarm is free to download, with in-app purchases available.

### Is Protractor for Angle Measuring free?

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

### Which has better reviews, Anchor Alarm or Protractor for Angle Measuring?

Protractor for Angle Measuring is rated higher. Anchor Alarm averages 4.0 out of 5 from 11 ratings, while Protractor for Angle Measuring averages 4.5 from 1.1K ratings.

### Do Anchor Alarm or Protractor for Angle Measuring have ads?

Protractor for Angle Measuring shows ads; Anchor Alarm does not.

### Which is updated more often, Anchor Alarm or Protractor for Angle Measuring?

Anchor Alarm ships an update every 2 weeks, and Protractor for Angle Measuring every 3 weeks. Most recently, Anchor Alarm was updated on November 3, 2026 and Protractor for Angle Measuring on November 12, 2026.

---

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