Trigonometry Help vs 小灵龙App
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
Read full descriptionHide full description
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.
小灵龙App
This app provides comprehensive mobile services for campus cards, including traditional card functions like consumption and authentication, enhanced with QR code capabilities. It offers features for managing your campus card, paying various campus fees, and booking campus facilities.
- Campus card management
- QR code functionality
- Campus fee payments
- Facility booking
- Card application and registration
Read full descriptionHide full description
【小灵龙】是一款面向校园的一卡通服务APP，在传统卡消费、认证的基础上增加了二维码功能，为校园用户提供专业、全面的移动一卡通服务。 【校园卡管理】 提供全面的校园卡服务，充值、信息查询、账单查询、流水查询、挂失／解挂、失卡招领、校园卡在线申请、校友注册等 【校园缴费】 项目缴费、电费、网费、辅修费、等级考试费、党团费、培训费、学费 【校园预订】 为校内餐厅、场馆、会议室、自习室等场所提供预订服务
Screenshots
Verdict
The clearest difference is review sentiment: Trigonometry Help at 91% against 小灵龙App's 33%. Trigonometry Help also leads on rating (4.7 vs 1.0) and ads (none vs shown). 小灵龙App's advantage is price (Free vs $1.99) and in-app purchases (none vs 3). On device support and iOS requirement 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
小灵龙App is free to download; Trigonometry Help costs $1.99 up front. Trigonometry Help sells 3 one-off in-app purchases. 小灵龙App asks for nothing beyond the download.
Trigonometry Help holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: Trigonometry Help has 477 ratings behind it against 12, 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 33% of 小灵龙App's.
Trigonometry Help ships an update every 13 months, 小灵龙App monthly. The most recent releases landed on September 23, 2026 and September 27, 2026 respectively.
| Parameter | Trigonometry Help | 小灵龙App |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.7 (477 ratings) — better | 1.0 (12 ratings) |
| Positive reviews | 90.8% of reviews — better | 33.3% of reviews |
| Number of ratings | 477 — better | 12 |
| Update frequency | Every 13 months | Monthly — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 21 MB | 157 MB |
| Age rating | +4 | 4+ |
| Developer | Armchair Engineering | 北京新中新诚通信息技术股份有限公司 |
Customer experience
Trigonometry Help
小灵龙App
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
小灵龙App
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
小灵龙App
No in-app purchases
