Calculator + vs Trigonometry Help
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator +
This app offers a free basic and scientific calculator with an elegant interface. Upgrade for advanced features like graphing, equation solving, and unit conversions. Supports fractions, percentages, and multiple themes.
- Free basic and scientific calculator
- Elegant and intuitive interface
- Advanced editing and equation display
- Fraction and percent support
- Graphing and equation solving
- Base converter and multiple themes
Read full descriptionHide full description
Award winning calculator app for iPad and iPhone. Designed with simplicity, usability and beauty in mind! FEATURES: - Free basic calculator - Free scientific calculator - Elegant & Intuitive interface - Advanced editing by easily going back and forth - Displays both the equation & the result at the same time - Supports Fraction & Percent - Supports many scientific functions If you are looking for more advanced features you can upgrade to one or more of the following: - Fraction Calculator with feet, inches & cm support! - Solving for x with a polynomial Calculator for solving quadratic & cubic equations 2x³ - 4x² - 22x + 24 = 0 - Linear Equations Solver for solving system of linear equations 2x – y = 9 3x + 4y = –14 - Graphing Calculator to find the local min, max & intersection points y = 2x³ – 4x (x² + y²)³ = -27y²x² - Triangle Calculator - Cone Calculator - Arc Calculator - Circle Calculator - Base Converter ( HEX OCT BIN DEC ) - Multiple themes Enjoy the FREE Scientific calculator on your iPhone & iPad. If you like it, support us by upgrading or giving us a positive review. Thanks :) Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Trigonometry Help
This app helps you quickly solve for unknown angles and sides of right-angled triangles. It provides a workings view for understanding the math, a scale drawing of the triangle, and a reference for basic trigonometric formulas. You can input angles in various formats and choose your desired decimal precision.
- Solve right-angled triangles
- Workings view for solutions
- Scale drawing of solved triangle
- Basic trig formulae reference
- Multiple angle input formats
- Customizable decimal places
Read full descriptionHide full description
Trig Help is a simple triangle calculator that enables you to quickly and easily find unknown angles & sides of any right-angled triangle. Features Include: - Accurately solve right-angled triangles - Workings view, so you can see the math behind the solutions (requires optional upgrade) - View a scale drawing of your solved triangle - View a handy set of basic trig formulae - Enter angles in radians, decimal degrees or degrees, minutes, seconds - Select your preferred number of decimal places What two App Store reviewers had to say about Trig Help: "I could never remember those simple formulas. I always had to dig out my text books from MANY YEARS ago to refresh my memory. THIS LITTLE APP IS A DELIGHT TO USE! I love it! Even my engineer friends are impressed. THANKS!" 5 Stars "Easy to use and accurate with high degree of precision. Would recommend to any toolmaker." 5 Stars Also available for OS X on the Mac App Store.
Screenshots
Verdict
The clearest difference is price: Calculator + at Free against Trigonometry Help's $1.99. Calculator + also leads on update cadence (every 5 days vs every 13 months) and ratings volume (10K vs 482). Trigonometry Help's advantage is ads (none vs shown) and iOS requirement (10.0 vs 16.4). On rating, review sentiment, in-app purchases and monetization model 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
Calculator + is free to download; Trigonometry Help costs $1.99 up front. Calculator + sells 10 in-app purchases, starting at $4.99 per month and Trigonometry Help sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.6 for Calculator + against 4.7 for Trigonometry Help. That said, the two scores are not equally well evidenced: Calculator + has 10K ratings behind it against 482, so its average is the more settled of the two. Written reviews are what separate them: 85% of Calculator +'s written reviews are positive against 91% of Trigonometry Help's.
Calculator + ships an update every 5 days, Trigonometry Help every 13 months. The most recent releases landed on November 12, 2026 and November 11, 2026 respectively.
| Parameter | Calculator + | Trigonometry Help |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.6 (10K ratings) | 4.7 (482 ratings) — better |
| Positive reviews | 84.9% of reviews | 91.0% of reviews — better |
| Number of ratings | 10K — better | 482 |
| Update frequency | Every 5 days — better | Every 13 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 10.0 — better |
| Further details — not scored | ||
| Size | 50 MB | 21 MB |
| Age rating | 4+ | +4 |
| Developer | xNeat.com | Armchair Engineering |
Customer experience
Calculator +
Trigonometry Help
User reviews
Calculator +
From 10K App Store ratingsWhat we love
- 👍 Great features and easy to use
- 👍 Efficient and quick
- 👍 Versatile, functional calculator
- 👍 Fantastic, easy to use app
- 👍 Awesome calculator app
Room to improve
- 🐛 New updated layout is awful
- 🐛 App is now terrible
- 🔒 Paying customer screwed over by update
- 🔒 Now timed trial, no free w/ads version
- 🔒 Not honest
Trigonometry Help
From 482 App Store ratingsWhat we love
- 🚀 Quick and easy to use
- 👍 User-friendly interface
- 🔧 Helpful for tradesmen and professionals
- ⚙️ Accurate calculations
- 🔍 Convenient for on-site use
Room to improve
- 🔢 Limited to right-angled triangles only
- 🔍 Lacks advanced trig functions
- 🔀 No option to rotate/flip the triangle view
Bugs and requests
Calculator +
Reported bugs
5 issues- Fraction calculator has TWO subtraction buttons and NO division button
- Decimals seem to be changed to fraction with no apparent way of changing it back
- Functionality is dropped by forcing you to the main menu every time you open it
- Currency converter broken
- Login screen freezes
Requested features
5 requests- Add mod function
- Add commas
- Add 1/x function
- Support for Retina Display
- Add number 4 with two lines
Trigonometry Help
Reported bugs
2 issues- Inconsistent performance on older devices
- Occasional crashes or freezes
Requested features
3 requests- Support for irregular triangles
- Ability to show step-by-step workings
- Option to switch between degrees/minutes/seconds and decimal values
In-app purchases
Calculator +
- Scientific Calculator3 Days trial$4.991 Month
- Calculator7 Days trial$39.991 Year
- Linear Calculator$2.99
- Factoring Calculator$2.99
- Handwriting Calculator$2.99
Show 5 moreShow fewer
- Graphing Calculator$3.99
- Fraction Calculator$3.99
- Scientific Calculator$4.99
- Calculator Plus$4.99
- Calculator$16.99
Trigonometry Help
- Trig Help Premium$0.99
- Trig Help Premium$1.99
- Trig Help Premium$3.99
Questions
Is Calculator + free?
Is Trigonometry Help free?
Which has better reviews, Calculator + or Trigonometry Help?
Do Calculator + or Trigonometry Help have ads?
Which is updated more often, Calculator + or Trigonometry Help?
Other comparisons















