# Castrol 2TRatio vs Protractor for Angle Measuring

The clearest difference is rating: Protractor for Angle Measuring at 4.5 against Castrol 2TRatio's 3.0. Protractor for Angle Measuring also leads on update cadence (every 2 weeks vs every 58 months) and ratings volume (1K vs 4). Castrol 2TRatio'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. Castrol 2TRatio asks for nothing beyond the download.

Protractor for Angle Measuring holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: Protractor for Angle Measuring has 1K ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 76% of Castrol 2TRatio's written reviews are positive against 49% of Protractor for Angle Measuring's, so the app with the better star average is not the one people write more warmly about.

Castrol 2TRatio ships an update every 58 months, Protractor for Angle Measuring every 2 weeks. The most recent releases landed on October 7, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Castrol 2TRatio | Protractor for Angle Measuring |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (4 ratings)](https://appshunter.io/ios/app/castrol-2tratio/id812548191/reviews) | **[4.5 (1K ratings)](https://appshunter.io/ios/app/protractor-for-angle-measuring/id6474609160/reviews)** |
| Number of ratings | 4 | **1K** |
| Positive reviews | **75.8% of reviews** | 49.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 58 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 15 MB | 112 MB |
| Requires iOS | **10.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Castrol Australia Pty Ltd](https://appshunter.io/developer/812548194) | [AppLiks Sp. z O.O.](https://appshunter.io/developer/1804335622) |

## What reviewers say

### Castrol 2TRatio

[App page](https://appshunter.io/ios/app/castrol-2tratio/id812548191)

Easily calculate the precise oil-to-fuel ratio for your 2-stroke engines. This tool is perfect for motorcycles, boats, lawnmowers, and garden equipment, ensuring you use the correct mix as recommended by manufacturers.

**Highlights:** Calculate oil-to-fuel ratio, Supports motorcycles, outboards, lawnmowers, Adjustable fuel slider, Adjustable ratio slider, Metric/Imperial measurement switch, Link to Castrol Lube guide

**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 Castrol 2TRatio free?

Castrol 2TRatio 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, Castrol 2TRatio or Protractor for Angle Measuring?

Protractor for Angle Measuring is rated higher. Castrol 2TRatio averages 3.0 out of 5 from 4 ratings, while Protractor for Angle Measuring averages 4.5 from 1K ratings.

### Do Castrol 2TRatio or Protractor for Angle Measuring have ads?

Protractor for Angle Measuring shows ads; Castrol 2TRatio does not.

### Which is updated more often, Castrol 2TRatio or Protractor for Angle Measuring?

Castrol 2TRatio ships an update every 58 months, and Protractor for Angle Measuring every 2 weeks. Most recently, Castrol 2TRatio was updated on October 7, 2026 and Protractor for Angle Measuring on October 14, 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.*