Comparison

Calculator + vs Trigonometry Help

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read 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/

About

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.

Highlights
  • Solve right-angled triangles
  • Workings view for solutions
  • Scale drawing of solved triangle
  • Basic trig formulae reference
  • Multiple angle input formats
  • Customizable decimal places
Features
Read 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

Calculator +4 screens
Trigonometry Help4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
Calculator + versus Trigonometry Help: the parameters behind the verdict, then further details
ParameterCalculator +Trigonometry Help
PriceFree — better$1.99
Rating4.6 (10K ratings)4.7 (482 ratings) — better
Positive reviews84.9% of reviews91.0% of reviews — better
Number of ratings10K — better482
Update frequencyEvery 5 days — betterEvery 13 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.410.0 — better
Further details — not scored
Size50 MB21 MB
Age rating4++4
DeveloperxNeat.comArmchair Engineering

Customer experience

Calculator +

All ratings10,276 ratings
Positive91.9%
Neutral2.8%
Negative5.3%
Written reviews942 reviews
Positive84.9%
Neutral4.0%
Negative11.0%

Trigonometry Help

All ratings477 ratings
Positive94.1%
Neutral2.3%
Negative3.6%
Written reviews144 reviews
Positive91.0%
Neutral2.1%
Negative6.9%

User reviews

Calculator +

From 10K App Store ratings

What 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 ratings

What 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

10 purchases

Calculator +

Subscriptions2
  • Scientific Calculator3 Days trial$4.991 Month
  • Calculator7 Days trial$39.991 Year
One-time8
  • Linear Calculator$2.99
  • Factoring Calculator$2.99
  • Handwriting Calculator$2.99
Show 5 more
  • Graphing Calculator$3.99
  • Fraction Calculator$3.99
  • Scientific Calculator$4.99
  • Calculator Plus$4.99
  • Calculator$16.99
3 purchases

Trigonometry Help

One-time3
  • Trig Help Premium$0.99
  • Trig Help Premium$1.99
  • Trig Help Premium$3.99

Questions

Is Calculator + free?
Calculator + is free to download, with in-app purchases available.
Is Trigonometry Help free?
Trigonometry Help costs $1.99, and also offers in-app purchases.
Which has better reviews, Calculator + or Trigonometry Help?
Trigonometry Help is rated higher. Calculator + averages 4.6 out of 5 from 10K ratings, while Trigonometry Help averages 4.7 from 482 ratings.
Do Calculator + or Trigonometry Help have ads?
Calculator + shows ads; Trigonometry Help does not.
Which is updated more often, Calculator + or Trigonometry Help?
Calculator + ships an update every 5 days, and Trigonometry Help every 13 months. Most recently, Calculator + was updated on November 12, 2026 and Trigonometry Help on November 11, 2026.

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