Comparison

Trigonometry Help Lite vs Right Triangle

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

Head to head
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.

About

Right Triangle

Instantly solve geometry homework and prepare for exams with this free calculator. It provides complete step-by-step solutions for all triangle quantities, including legs, hypotenuse, height, angles, perimeter, and area. Access learning videos and manage your solutions.

Highlights
  • Step-by-step solutions
  • Calculates legs, hypotenuse, height, angles, perimeter, area
  • Supports all length units
  • Curated learning videos
  • Feedback on incorrect inputs
  • Manage saved solutions
Features
Read full description

Finish homework instantly. Prepare for exams without stress. Free, complete step-by-step solutions. Enter your values and calculate legs, hypotenuse, height, angles, perimeter, and area. HOW IT WORKS Enter your values into 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, such as: - which features are used - how many solutions are generated This helps us improve. We cannot identify you. COST Everything is free to use. 24/7 access to your solutions. All solution steps always remain complete. If you need many solutions in a short time, various purchase options are available. EXTRAS - overview of all variables - all length units - 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.

Screenshots

Trigonometry Help Lite4 screens
Right Triangle4 screens

Verdict

The call

The clearest difference is rating: Trigonometry Help Lite at 4.7 against Right Triangle's 3.8. Trigonometry Help Lite also leads on ratings volume (768 vs 6) and iOS requirement (11.0 vs 15.0). Right Triangle's advantage is update cadence (every 3 weeks vs every 6 weeks). On price, ads, 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

Both are free to download. Trigonometry Help Lite sells 3 one-off in-app purchases and Right Triangle sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Trigonometry Help Lite holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: Trigonometry Help Lite has 768 ratings behind it against 6, so its average is the more settled of the two.

UpkeepUpdate frequency

Trigonometry Help Lite ships an update every 6 weeks, Right Triangle every 3 weeks. The most recent releases landed on September 26, 2026 and August 26, 2026 respectively.

Scorecard4 real differences · 6 level
Trigonometry Help Lite versus Right Triangle: the parameters behind the verdict, then further details
ParameterTrigonometry Help LiteRight Triangle
PriceFreeFree
Rating4.7 (768 ratings) — better3.8 (6 ratings)
Positive reviews87.5% of reviews—
Number of ratings768 — better6
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.0
Further details — not scored
Size17 MB180 MB
Age rating4+4+
DeveloperArmchair EngineeringGlindemann, Sennoun, Langer GbR

Customer experience

Trigonometry Help Lite

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

Right Triangle

All ratings6 ratings
Positive66.7%
Neutral16.7%
Negative16.7%

Bugs and requests

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

Right Triangle

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Trigonometry Help Lite

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

Right Triangle

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$2.99
  • Lifetime Access$2.99

Questions

Is Trigonometry Help Lite free?
Trigonometry Help Lite is free to download, with in-app purchases available.
Is Right Triangle free?
Right Triangle is free to download, with in-app purchases available.
Which has better reviews, Trigonometry Help Lite or Right Triangle?
Trigonometry Help Lite is rated higher. Trigonometry Help Lite averages 4.7 out of 5 from 768 ratings, while Right Triangle averages 3.8 from 6 ratings.
Do Trigonometry Help Lite or Right Triangle have ads?
Neither Trigonometry Help Lite nor Right Triangle shows ads.
Which is updated more often, Trigonometry Help Lite or Right Triangle?
Trigonometry Help Lite ships an update every 6 weeks, and Right Triangle every 3 weeks. Most recently, Trigonometry Help Lite was updated on September 26, 2026 and Right Triangle on August 26, 2026.

Other comparisons