Comparison

Pythagoras Calculator vs Trigonometry Help Lite

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

Head to head
About

Pythagoras Calculator

Easily calculate any side of a right-angled triangle using the Pythagorean theorem. Input two sides to find the third, with all calculations saved in a history. Supports fractions and offers an ad-free option.

Highlights
  • Pythagorean theorem calculations
  • Calculate any of the three sides
  • History of calculations
  • Supports fraction input
  • Shareable solutions
  • Ad-free option
Features
Read full description

Finish your homework instantly. Prepare for exams without stress. Free, complete step-by-step solutions. Enter two sides and calculate the third using the Pythagorean theorem. HOW IT WORKS Enter your values in the correct fields and get started. You’ll receive the solution instantly and can share it with friends or classmates. YOUR PERSONAL DATA We don’t need it. Only anonymized data is collected, for example: - which features are used - how many solutions are generated This helps us improve. We cannot draw any conclusions about you. COSTS Everything is free to use. 24/7 access to your solutions. All solution steps are always fully available. If you need many solutions in a short time, various purchase options are available. EXTRAS - curated learning videos - feedback on incorrect inputs - manage your own solutions - app introduction CONTACT Questions and feedback via Discord or directly in the app review.

About

Trigonometry Help Lite

This app quickly calculates unknown angles and sides of right-angled triangles. It offers a workings view for detailed solutions, scale drawings, and a formula reference. Input angles in various formats and customize decimal precision.

Highlights
  • Solve right-angled triangles
  • View detailed math workings
  • 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 macOS on the Mac App Store.

Screenshots

Pythagoras Calculator4 screens
Trigonometry Help Lite4 screens

Verdict

The call

The clearest difference is update cadence: Pythagoras Calculator at every 3 weeks against Trigonometry Help Lite's every 6 weeks. Trigonometry Help Lite's advantage is ratings volume (768 vs 242) and iOS requirement (11.0 vs 15.0). On price, rating, review sentiment and ads 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

Both are free to download. Pythagoras Calculator sells 8 one-off in-app purchases and Trigonometry Help Lite 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 Pythagoras Calculator against 4.7 for Trigonometry Help Lite. Both are backed by a comparable volume of ratings — 242 and 768 respectively. Written reviews are what separate them: 83% of Pythagoras Calculator's written reviews are positive against 88% of Trigonometry Help Lite's.

UpkeepUpdate frequency

Pythagoras Calculator ships an update every 3 weeks, Trigonometry Help Lite every 6 weeks. Both last shipped on September 26, 2026.

Scorecard3 real differences · 7 level
Pythagoras Calculator versus Trigonometry Help Lite: the parameters behind the verdict, then further details
ParameterPythagoras CalculatorTrigonometry Help Lite
PriceFreeFree
Rating4.6 (242 ratings)4.7 (768 ratings) — better
Positive reviews83.0% of reviews87.5% of reviews — better
Number of ratings242768 — better
Update frequencyEvery 3 weeks — betterEvery 6 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.011.0 — better
Further details — not scored
Size179 MB17 MB
Age rating4+4+
DeveloperGlindemann, Sennoun, Langer GbRArmchair Engineering

Customer experience

Pythagoras Calculator

All ratings242 ratings
Positive90.1%
Neutral2.1%
Negative7.9%
Written reviews106 reviews
Positive83.0%
Neutral2.8%
Negative14.2%

Trigonometry Help Lite

All ratings768 ratings
Positive92.6%
Neutral3.0%
Negative4.4%
Written reviews16 reviews
Positive87.5%
Neutral6.3%
Negative6.3%

User reviews

Pythagoras Calculator

From 242 App Store ratings

What we love

  • 👍 Easy to use and simple interface
  • ✅ Accurate calculations for Pythagorean theorem
  • 📚 Shows step-by-step solutions for learning
  • 🚀 Fast and efficient computation
  • 💼 Useful for construction and woodworking projects

Room to improve

  • 📢 Intrusive and annoying advertisements
  • 💳 Deceptive payment practices and fraudulent charges
  • 🔐 Suspicious credit card requirements for access
  • ⚠️ Forced rating prompts
  • ❌ Limited functionality (only works with 2 known sides)

Trigonometry Help Lite

From 768 App Store ratings

What we love

  • 👍 Simple and intuitive user interface
  • 🚀 Quick and fast calculations
  • 💼 Practical for professional use (construction, surveying)
  • ✅ Reliable and doesn't crash
  • 📚 Helpful for learning trigonometry

Room to improve

  • 💰 Unclear upgrade value proposition
  • 📊 Limited decimal place precision in free version
  • 🔍 Insufficient feature differentiation between tiers
  • ⚠️ Calculation accuracy issues reported

Bugs and requests

Pythagoras Calculator

Reported bugs

6 issues
  • App crashes or fails to calculate
  • Paid ad removal not working properly
  • Fraudulent payment processing through third-party sites
  • Occasional incorrect calculation results
  • App not functioning on iPhone 5SE and older devices
Show 1 more
  • Persistent ads despite payment for removal

Requested features

6 requests
  • Calculate triangle angles
  • Support angle-based calculations with one side
  • Better monetization without aggressive ads
  • Improved ratings system
  • Real-time results display
Show 1 more
  • Support for non-right triangles

Trigonometry Help Lite

Reported bugs

1 issue
  • Incorrect calculation results in some cases

Requested features

4 requests
  • Better visual representation of triangles
  • Clearer explanation of premium features
  • Higher default decimal place precision
  • More detailed feature descriptions for paid tiers

In-app purchases

8 purchases

Pythagoras Calculator

One-time8
  • +30 User Tokens$0.29
  • +1 Convenience Token / 6h, max. +2$0.59
  • +2 Convenience Tokens / 6h, max. +4$0.99
Show 5 more
  • +150 User Tokens$0.99
  • +300 User Tokens$1.49
  • +4 Convenience Tokens / 6h, max. +8$1.59
  • Remove Ads$1.99
  • Lifetime Access$1.99
3 purchases

Trigonometry Help Lite

One-time3
  • Trig Help Premium$2.99
  • Trig Help Premium$3.99
  • Trig Help Premium$5.99

Questions

Is Pythagoras Calculator free?
Pythagoras Calculator is free to download, with in-app purchases available.
Is Trigonometry Help Lite free?
Trigonometry Help Lite is free to download, with in-app purchases available.
Which has better reviews, Pythagoras Calculator or Trigonometry Help Lite?
Trigonometry Help Lite is rated higher. Pythagoras Calculator averages 4.6 out of 5 from 242 ratings, while Trigonometry Help Lite averages 4.7 from 768 ratings.
Do Pythagoras Calculator or Trigonometry Help Lite have ads?
Neither Pythagoras Calculator nor Trigonometry Help Lite shows ads.
Which is updated more often, Pythagoras Calculator or Trigonometry Help Lite?
Pythagoras Calculator ships an update every 3 weeks, and Trigonometry Help Lite every 6 weeks. Most recently, Pythagoras Calculator was updated on September 26, 2026 and Trigonometry Help Lite on September 26, 2026.

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