Trigonometry Help Lite vs Tri
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.
Tri
This app simplifies math homework with a suite of tools including area, basic, and trigonometry calculators. It offers offline access and equation solvers for first and second-degree equations, with more features planned.
- Offline Access
- Area Calculator
- Basic Calculator
- Trigonometry Calculator
- Unit Converter
- Equation Solvers
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Easily complete your homework with this app! Key Features: Offline Access: Use the app anytime, anywhere. Area Calculator: Quickly compute the area of shapes. Basic Calculator: Simplify everyday calculations. Trigonometry Calculator: Solve the Pythagorean theorem. Calculate trigonometric functions. Unit Converter: Convert between units with ease. Equation Solvers: Solve first-degree equations! Solve second-degree equations! And More Features Coming Soon!
Screenshots
Verdict
The clearest difference is ads: Trigonometry Help Lite at none against Tri's shown. Trigonometry Help Lite also leads on review sentiment (88% vs 67%) and ratings volume (768 vs 17). On price, update cadence, 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 Tri sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Trigonometry Help Lite holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: Trigonometry Help Lite has 768 ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 88% of Trigonometry Help Lite's written reviews are positive against 67% of Tri's.
Trigonometry Help Lite ships an update every 6 weeks, Tri every 2 months. The most recent releases landed on September 26, 2026 and June 4, 2026 respectively.
| Parameter | Trigonometry Help Lite | Tri |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (768 ratings) — better | 4.5 (17 ratings) |
| Positive reviews | 87.5% of reviews — better | 66.7% of reviews |
| Number of ratings | 768 — better | 17 |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No — better | Yes |
| 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 | 12.0 |
| Further details — not scored | ||
| Size | 17 MB | 48 MB |
| Age rating | 4+ | 4+ |
| Developer | Armchair Engineering | Alejandro Apodaca |
Customer experience
Trigonometry Help Lite
Tri
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
Tri
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
Tri
- Quitar anuncios$1.99
Questions
Is Trigonometry Help Lite free?
Is Tri free?
Which has better reviews, Trigonometry Help Lite or Tri?
Do Trigonometry Help Lite or Tri have ads?
Which is updated more often, Trigonometry Help Lite or Tri?
Other comparisons
