Spur Gear Calculator vs Protractor for Angle Measuring
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Spur Gear Calculator
Calculate essential dimensions for spur gears and pinions using diametral pitch or module. This tool provides outside diameter, center distance, and ratio for specific gear types.
- Calculate Outside Diameter
- Calculate Centre Distance
- Calculate Ratio
- Supports Diametral Pitch
- Supports Module
- Spur gear and pinion specific
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This is a specialised set calculators that uses the gear systems (Diametral Pitch or Module) and the number of teeth to calculate the Outside Diameter, Centre Distance and Ratio of Spur gears and pinions. Please note that these calculators should ONLY be used for spur gears and pinons, NOT for Helical gears.
Protractor for Angle Measuring
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.
- 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
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Your pocket angle expert! Transform your iPhone into a precision tool for real-time angle measurement. Simply tap, snap, and assess angles effortlessly with our intuitive touch and camera modes. Measure unlimited angles simultaneously, customize tools, and enjoy the perfect blend of accuracy and simplicity. Ideal for architects or anyone seeking quick, reliable measurements. Embrace the power of Protractor for fast, on-the-go angle assessments! Key Features: • Touch Measure: Tap the screen to set angles (use the camera view). • Plumb Bob Pendulum: Perfect for determining tilt (calibrate for accuracy). • Angle Measurement in Photos and from Camera. • Simultaneous Measurement of Unlimited Angles. • Tool Color Customization for Visual Convenience. Privacy Policy: https://appliks.com/privacy-policy Terms of Use: https://appliks.com/terms-of-use
Screenshots
Verdict
The clearest difference is review sentiment: Spur Gear Calculator at 100% against Protractor for Angle Measuring's 48%. Spur Gear Calculator also leads on in-app purchases (none vs 5) and ads (none vs shown). Protractor for Angle Measuring's advantage is rating (4.5 vs 3.7) and update cadence (every 3 weeks vs every 12 months). On price and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Protractor for Angle Measuring sells 5 in-app purchases, starting at $0.99 per 7 days. Spur Gear Calculator asks for nothing beyond the download.
Protractor for Angle Measuring holds the better App Store score, 4.5 against 3.7. That said, the two scores are not equally well evidenced: Protractor for Angle Measuring has 1.1K ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 100% of Spur Gear Calculator'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.
Spur Gear Calculator ships an update every 12 months, Protractor for Angle Measuring every 3 weeks. The most recent releases landed on November 1, 2026 and November 12, 2026 respectively.
| Parameter | Spur Gear Calculator | Protractor for Angle Measuring |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) | 4.5 (1.1K ratings) — better |
| Positive reviews | 100.0% of reviews — better | 48.1% of reviews |
| Number of ratings | 3 | 1.1K — better |
| Update frequency | Every 12 months | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 11 MB | 120 MB |
| Age rating | 4+ | 4+ |
| Developer | SpiralArm Consulting Limited | AppLiks Sp. z O.O. |
Customer experience
Spur Gear Calculator
Protractor for Angle Measuring
Bugs and requests
Spur Gear Calculator
Not enough reviews yet to summarise bugs or requests.
Protractor for Angle Measuring
Reported bugs
2 issues- Protractor tool is hard to use and requires multiple tries
- Angle measurements do not match real-world angles
Requested features
3 requests- 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
In-app purchases
Spur Gear Calculator
No in-app purchases
Protractor for Angle Measuring
- Weekly Access$0.997 Days
- Weekly Access with Trial3 Days trial$1.997 Days
- Weekly Access$1.997 Days
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- Yearly Access$3.991 Year
- Yearly Access$4.991 Year
Questions
Is Spur Gear Calculator free?
Is Protractor for Angle Measuring free?
Which has better reviews, Spur Gear Calculator or Protractor for Angle Measuring?
Do Spur Gear Calculator or Protractor for Angle Measuring have ads?
Which is updated more often, Spur Gear Calculator or Protractor for Angle Measuring?
Other comparisons
