# Trigonometry Help vs 小灵龙App

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.

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.

## The numbers

| Metric | Trigonometry Help | 小灵龙App |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.7 (477 ratings)](https://appshunter.io/ios/app/trigonometry-help/id411415648/reviews)** | [1.0 (12 ratings)](https://appshunter.io/ios/app/app/id1221738240/reviews) |
| Number of ratings | **477** | 12 |
| Positive reviews | **90.8% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 21 MB | 157 MB |
| Requires iOS | 10.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Armchair Engineering](https://appshunter.io/developer/398901339) | [北京新中新诚通信息技术股份有限公司](https://appshunter.io/developer/736575065) |

## What reviewers say

### Trigonometry Help

[App page](https://appshunter.io/ios/app/trigonometry-help/id411415648)

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.

**Highlights:** Solve right-angled triangles, Workings view for solutions, Scale drawing of solved triangle, Basic trig formulae reference, Multiple angle input formats, Customizable decimal places

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Trig Help Premium | $0.99 | one-time |
| Trig Help Premium | $1.99 | one-time |
| Trig Help Premium | $3.99 | one-time |

**What reviewers like**

- 🚀 Quick and easy to use
- 👍 User-friendly interface
- 🔧 Helpful for tradesmen and professionals
- ⚙️ Accurate calculations
- 🔍 Convenient for on-site use

**What reviewers complain about**

- 🔢 Limited to right-angled triangles only
- 🔍 Lacks advanced trig functions
- 🔀 No option to rotate/flip the triangle view

**Reported bugs**

- Inconsistent performance on older devices
- Occasional crashes or freezes

**Requested features**

- 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

[App page](https://appshunter.io/ios/app/app/id1221738240)

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.

**Highlights:** Campus card management, QR code functionality, Campus fee payments, Facility booking, Card application and registration

**In-app purchases:** none


## Frequently asked questions

### Is Trigonometry Help free?

Trigonometry Help costs $1.99, and also offers in-app purchases.

### Is 小灵龙App free?

小灵龙App is free to download, with no in-app purchases.

### Which has better reviews, Trigonometry Help or 小灵龙App?

Trigonometry Help is rated higher. Trigonometry Help averages 4.7 out of 5 from 477 ratings, while 小灵龙App averages 1.0 from 12 ratings.

### Do Trigonometry Help or 小灵龙App have ads?

小灵龙App shows ads; Trigonometry Help does not.

### Which is updated more often, Trigonometry Help or 小灵龙App?

Trigonometry Help ships an update every 13 months, and 小灵龙App monthly. Most recently, Trigonometry Help was updated on September 23, 2026 and 小灵龙App on September 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*