Trigonometry Help Lite vs Right Triangle
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Solve right-angled triangles
- View detailed math workings
- Scale drawing of solved triangle
- Basic trig formulae reference
- Multiple angle input formats
- Customizable decimal places
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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.
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.
- 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
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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
Verdict
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
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.
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.
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.
| Parameter | Trigonometry Help Lite | Right Triangle |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (768 ratings) — better | 3.8 (6 ratings) |
| Positive reviews | 87.5% of reviews | — |
| Number of ratings | 768 — better | 6 |
| Update frequency | Every 6 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 17 MB | 180 MB |
| Age rating | 4+ | 4+ |
| Developer | Armchair Engineering | Glindemann, Sennoun, Langer GbR |
Customer experience
Trigonometry Help Lite
Right Triangle
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
Trigonometry Help Lite
- Trig Help Premium$2.99
- Trig Help Premium$3.99
- Trig Help Premium$5.99
Right Triangle
- +30 User Tokens$0.29
- +1 Convenience Token / 6h, max. +2$0.59
- +2 Convenience Tokens / 6h, max. +4$0.99
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- +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?
Is Right Triangle free?
Which has better reviews, Trigonometry Help Lite or Right Triangle?
Do Trigonometry Help Lite or Right Triangle have ads?
Which is updated more often, Trigonometry Help Lite or Right Triangle?
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