Trigonometry Help vs SSI Steel Design
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Solve right-angled triangles
- Workings view for solutions
- 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 OS X on the Mac App Store.
SSI Steel Design
Easily determine the capacity of structural steel beams and columns. Get detailed calculation sheets to verify your work, designed according to AISC 360-16 standards. Features intuitive touch-based interaction and built-in material databases.
- Determine steel beam and column capacity
- Generate detailed calculation sheets
- Intuitive touch-based design input
- Supports AISC 360-16 standards
- Built-in material databases
- Saves calculation sheets as JPG
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Determine capacity of structural steel beam and column easily and obtain results and calculation sheets to double-check your work!! This is a great tool for civil engineers. You will find it useful to calculate capacity of built-up beam and column. The design is in accordance with the provision of AISC 360-16 which is the latest version of design theory. INTUITIVE TOUCH-BASED INTERACTION Quickly place dimensions of the built-up beam or column, and select the steel grade using a simple graphical design. Out solver algorithm will automatically solve and determine the capacity Immediately see what the maximum capacity of the section and also generate calculation sheet to see the calculation details and procedures simultaneously. The calculation sheet will be in .jpg form and automatically saved into your photo gallery. DOUBLY SYMMETRIC AND SINGLY SYMETRIC SECTION AND BUILT-IN MATERIALS Flexible dimensions can be placed to define the size of the section directly. The built-in databases of materials are also provided, including yield strength of 370 MPa, 420 MPa and 500 MPa CONTACT We want to hear from you!! Issues, questions, or requests? Please contact us via m.me/ssibuildingtechnology
Screenshots
Verdict
The clearest difference is price: SSI Steel Design at Free against Trigonometry Help's $1.99. SSI Steel Design also leads on update cadence (every 3 months vs every 13 months). Trigonometry Help's advantage is rating (4.7 vs 3.0) and review sentiment (91% vs 50%). On ads and in-app purchases 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
SSI Steel Design is free to download; Trigonometry Help costs $1.99 up front. Trigonometry Help sells 3 one-off in-app purchases and SSI Steel Design sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Trigonometry Help holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Trigonometry Help has 481 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 91% of Trigonometry Help's written reviews are positive against 50% of SSI Steel Design's.
Trigonometry Help ships an update every 13 months, SSI Steel Design every 3 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | Trigonometry Help | SSI Steel Design |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.7 (481 ratings) — better | 3.0 (1 ratings) |
| Positive reviews | 91.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 481 — better | 1 |
| Update frequency | Every 13 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 10.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 21 MB | 23 MB |
| Age rating | +4 | 4+ |
| Developer | Armchair Engineering | Sahaviriya Steel Industries Public Company Limited |
Customer experience
Trigonometry Help
SSI Steel Design
Bugs and requests
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
SSI Steel Design
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Trigonometry Help
- Trig Help Premium$0.99
- Trig Help Premium$1.99
- Trig Help Premium$3.99
SSI Steel Design
- Full Report Sheet$12.99
Questions
Is Trigonometry Help free?
Is SSI Steel Design free?
Which has better reviews, Trigonometry Help or SSI Steel Design?
Do Trigonometry Help or SSI Steel Design have ads?
Which is updated more often, Trigonometry Help or SSI Steel Design?
Other comparisons
