Scientific Calculator++ vs Protractor (Angle measurement)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Scientific Calculator++
This powerful calculator app offers advanced functions for complex calculations, including fraction manipulation, angle conversions, and equation solving. It features a history of your calculations and a user-friendly interface designed for iPad.
- Calculation history
- Fraction manipulation
- Angle conversion (degrees, minutes, seconds)
- Permutation and combination calculations
- LCM and GCD
- Equation solver
- Coordinate conversion
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The creators of 5-star Scientific++ and Statistics Calculator++ redesigned Scientific Calculator++ exclusively for iPad. Please note that the statistics features that you see in the screen shots are only available through an In-App Purchase. The features that are listed below are all included in the regular purchase of the app. Major features of Scientific Calculator++ are: - Shows the expression as you enter and keeps a history of your calculations. - Capability of performing fraction manipulations and converting between different formats (proper, improper, and mixed fractions) and seamless integration of fraction, integer, and decimal manipulations. - Capability of inputting degrees, minutes, and seconds for angles and converting between degrees-minutes-seconds format and decimal format. - Capability of calculating permutation, combination, Least Common Multiple (LCM), Greatest Common Divisor (GCD), and prime factorization. - Quadratic and system of two linear equations solver. - Rectangular to polar and polar to rectangular coordinate conversion (extremely useful for phasor calculations for electrical engineers) - Common physical constants can be chosen from a list and used in the calculations. - Throws a set of dice (choice of 1 die to 4 dice) - Backspace to delete last digit entered. - Sinusoidal functions can be calculated for angles in units of degrees, radians, or gradians. - Showing the content of memory on MR button, as long as it fits. You are going to love the simplicity of the user interface and yet have the powerful functionality with which Scientific Calculator++ is loaded. Please do not hesitate to contact us for any questions, comments, to report any bugs, or to suggest additional functions you would like to see in the upcoming updates. Visit our website www.dogahe.com for other product descriptions.
Protractor (Angle measurement)
Measure angles of objects using your device's camera. This utility app acts as a digital protractor, allowing you to accurately determine angles in real-world scenarios. Perfect for when a physical protractor is unavailable.
- Camera-based angle measurement
- Digital protractor functionality
- Measure angles of objects
- Real-world angle determination
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You are there when you need a protractor? Here is the absence of a protractor, try using a protractor app. You can measure the angle of the object is reflected in the camera protractor. Try using a protractor protractor various apps, app.
Screenshots
Verdict
The clearest difference is price: Protractor (Angle measurement) at Free against Scientific Calculator++'s $2.99. Protractor (Angle measurement) also leads on in-app purchases (none vs 2) and update cadence (every 5 weeks vs every 38 months). Scientific Calculator++'s advantage is rating (5.0 vs 3.6) and ads (none vs shown). On review sentiment, ratings volume and iOS requirement 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
Protractor (Angle measurement) is free to download; Scientific Calculator++ costs $2.99 up front. Scientific Calculator++ sells 2 one-off in-app purchases. Protractor (Angle measurement) asks for nothing beyond the download.
Scientific Calculator++ holds the better App Store score, 5.0 against 3.6. Both are backed by a comparable volume of ratings — 21 and 10 respectively. Written reviews complicate that: 67% of Scientific Calculator++'s written reviews are positive against 68% of Protractor (Angle measurement)'s, so the app with the better star average is not the one people write more warmly about.
Scientific Calculator++ ships an update every 38 months, Protractor (Angle measurement) every 5 weeks. The most recent releases landed on October 15, 2026 and October 18, 2026 respectively.
| Parameter | Scientific Calculator++ | Protractor (Angle measurement) |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 5.0 (21 ratings) — better | 3.6 (10 ratings) |
| Positive reviews | 66.7% of reviews | 68.1% of reviews — better |
| Number of ratings | 21 — better | 10 |
| Update frequency | Every 38 months | Every 5 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Ad-supported — better |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 3 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Dogahe | EONSOFT |
Customer experience
Scientific Calculator++
Protractor (Angle measurement)
Bugs and requests
Scientific Calculator++
Not enough reviews yet to summarise bugs or requests.
Protractor (Angle measurement)
Reported bugs
8 issues- Camera is always blurry
- Ads cover buttons
- App is a ghost app, cannot open
- Time limit makes it unusable
- Measures only in radians (free)
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- Protractor over camera view, no needle/indication
- App is difficult to use
- Hard to hold still without tripod
Requested features
10 requests- Ability to freeze image
- Ability to use photos for measurement
- Upload a still image and overlay protractor
- Improve accuracy with shaky hands
- Add option to take a picture and measure
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- Stabilize the camera
- Make numbers easier to read
- Remove time limit on free version
- Allow measurement in degrees for free
- Delete purchase history
In-app purchases
Scientific Calculator++
- List Size Plus$0.99
- Quadratic Plus$0.99
Protractor (Angle measurement)
No in-app purchases
Questions
Is Scientific Calculator++ free?
Is Protractor (Angle measurement) free?
Which has better reviews, Scientific Calculator++ or Protractor (Angle measurement)?
Do Scientific Calculator++ or Protractor (Angle measurement) have ads?
Which is updated more often, Scientific Calculator++ or Protractor (Angle measurement)?
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