Trgnmtry vs Trigonometry Hong Kong
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Trgnmtry
Explore trigonometric relationships visually by interacting with a unit circle. Customize displayed measures and angle intervals for a dynamic learning experience. Adapts beautifully to both light and dark modes.
- Interactive unit circle
- Visualize trigonometric measures
- Customizable angle intervals
- Supports light and dark mode
- Geometric relation display
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Watch as all of the trigonometric measures are drawn in their geometric relations as you drag your finger around the unit circle. You can choose which measures to see, and set specific angle intervals that can be shown. Looks beautiful in iOS Light or Dark mode!
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 rating: Trigonometry Hong Kong at 5.0 against Trgnmtry's 3.4. Trigonometry Hong Kong also leads on iOS requirement (15.6 vs 17.0). Trgnmtry's advantage is ratings volume (5 vs 1). On update cadence, 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
Trigonometry Hong Kong holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: Trgnmtry has 5 ratings behind it against 1, so its average is the more settled of the two.
Trgnmtry ships an update every 21 months, Trigonometry Hong Kong every 34 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | Trgnmtry | Trigonometry Hong Kong |
|---|---|---|
| Price | — | Free — better |
| Rating | 3.4 (5 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 5 — better | 1 |
| Update frequency | Every 21 months — better | Every 34 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 17.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 5 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Andrew McKnight | See Yan Wong |
Customer experience
Trgnmtry
Trigonometry Hong Kong
In-app purchases
Trgnmtry
No in-app purchases
Trigonometry Hong Kong
No in-app purchases
Questions
Is Trgnmtry free?
Is Trigonometry Hong Kong free?
Which has better reviews, Trgnmtry or Trigonometry Hong Kong?
Do Trgnmtry or Trigonometry Hong Kong have ads?
Which is updated more often, Trgnmtry or Trigonometry Hong Kong?
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