Trigonometric Equations vs Trigonometry Hong Kong
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Trigonometric Equations
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A quick reference to over 150 trigonometric equations that are essential to any student taking a math course with trigonometry as one of its subjects. Complete with zoomable equations as well as a sample problem provided with hint and solution. An easy to use menu with the options All equations, Basics, Identities, Power reduction, Half angle, Triple angle, Calculus. FadiSoft icon on credits page lists all apps by FadiSoft.
Trigonometry Hong Kong
This app provides a comprehensive guide to trigonometric formulas essential for Hong Kong university entrance exams. It covers a wide range of formulas, from basic sine and cosine to more advanced compound and subsidiary angle identities.
- Compound Angle Formulas
- Subsidiary Angle Formulas
- Double Angle Formulas
- Triple Angle Formulas
- Half Angle Formulas
- Product-To-Sum Formulas
- Sum-To-Product Formulas
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Trigonometric Compound Angle formulas used in the public examination for the entrance of the universities in Hong Kong. Contents :- 1. Sine Formula 2. Cosine Formula 3. Tangent Formula 4. Compound Angle Formula 5. Subsidiary Angle Formula 6. Double Angle Formula 7. Triple Angle Formula 8. Half Angle Formula 9. T Formula 10. Product-To- Sum Formula 11. Sum-To- Product Formula 12. Principal Value 13. General solution For Trigonometric Functions
Screenshots
Verdict
The clearest difference is price: Trigonometry Hong Kong at Free against Trigonometric Equations's $0.99. Trigonometric Equations's advantage is iOS requirement (9.0 vs 15.6). On update cadence, ads, in-app purchases and device support 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
Trigonometry Hong Kong is free to download; Trigonometric Equations costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Trigonometric Equations ships an update every 20 months, Trigonometry Hong Kong every 34 months. The most recent releases landed on October 25, 2026 and October 21, 2026 respectively.
| Parameter | Trigonometric Equations | Trigonometry Hong Kong |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 20 months — better | Every 34 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 10 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | FadiSoft Inc. | See Yan Wong |
In-app purchases
Trigonometric Equations
No in-app purchases
Trigonometry Hong Kong
No in-app purchases
Questions
Is Trigonometric Equations free?
Is Trigonometry Hong Kong free?
Do Trigonometric Equations or Trigonometry Hong Kong have ads?
Which is updated more often, Trigonometric Equations or Trigonometry Hong Kong?
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