Scientific Calculator++ vs ThetaCalc
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.
ThetaCalc
This utility app provides a Reverse Polish Notation (RPN) calculator. Users can extend its functionality by programming custom functions and equations using JavaScript.
- Reverse Polish Notation (RPN) calculator
- User-programmable functions
- JavaScript equation support
- Extensible functionality
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ThetaCalc is a RPN (Reverse Polish Notation) calculator which can be extended by functions and equations programmed by the user in JavaScript.
Screenshots
Verdict
The clearest difference is price: ThetaCalc at Free against Scientific Calculator++'s $2.99. ThetaCalc also leads on in-app purchases (none vs 2) and review sentiment (100% vs 67%). Scientific Calculator++'s advantage is rating (5.0 vs 4.3) and ratings volume (21 vs 4). On ads 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
ThetaCalc is free to download; Scientific Calculator++ costs $2.99 up front. Scientific Calculator++ sells 2 one-off in-app purchases. ThetaCalc asks for nothing beyond the download.
Scientific Calculator++ holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Scientific Calculator++ has 21 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 67% of Scientific Calculator++'s written reviews are positive against 100% of ThetaCalc'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, ThetaCalc every 3 months. The most recent releases landed on October 23, 2026 and October 29, 2026 respectively.
| Parameter | Scientific Calculator++ | ThetaCalc |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 5.0 (21 ratings) — better | 4.3 (4 ratings) |
| Positive reviews | 66.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 21 — better | 4 |
| Update frequency | Every 38 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Free — better |
| Devices | iPad | iPhone, iPad — better |
| Requires iOS | 13.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 3 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Dogahe | Felix Stehli |
Customer experience
Scientific Calculator++
ThetaCalc
In-app purchases
Scientific Calculator++
- List Size Plus$0.99
- Quadratic Plus$0.99
ThetaCalc
No in-app purchases
Questions
Is Scientific Calculator++ free?
Is ThetaCalc free?
Which has better reviews, Scientific Calculator++ or ThetaCalc?
Do Scientific Calculator++ or ThetaCalc have ads?
Which is updated more often, Scientific Calculator++ or ThetaCalc?
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