# Trigonometry Help Lite vs Trigonometry(Math Drills)

The clearest difference is in-app purchases: Trigonometry(Math Drills) at none against Trigonometry Help Lite's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Trigonometry Help Lite sells 3 one-off in-app purchases. Trigonometry(Math Drills) asks for nothing beyond the download.

Trigonometry Help Lite ships an update every 6 weeks, Trigonometry(Math Drills) monthly. The most recent releases landed on September 26, 2026 and August 4, 2026 respectively.

## The numbers

| Metric | Trigonometry Help Lite | Trigonometry(Math Drills) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (768 ratings)](https://appshunter.io/ios/app/trigonometry-help-lite/id1465685523/reviews)** | — |
| Number of ratings | **768** | — |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 28 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Armchair Engineering](https://appshunter.io/developer/398901339) | [郷 田村](https://appshunter.io/developer/1574588679) |

## What reviewers say

### Trigonometry Help Lite

[App page](https://appshunter.io/ios/app/trigonometry-help-lite/id1465685523)

This app quickly calculates unknown angles and sides of right-angled triangles. It offers a workings view for detailed solutions, scale drawings, and a formula reference. Input angles in various formats and customize decimal precision.

**Highlights:** Solve right-angled triangles, View detailed math workings, 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 | $2.99 | one-time |
| Trig Help Premium | $3.99 | one-time |
| Trig Help Premium | $5.99 | one-time |

**What reviewers like**

- 👍 Simple and intuitive user interface
- 🚀 Quick and fast calculations
- 💼 Practical for professional use (construction, surveying)
- ✅ Reliable and doesn't crash
- 📚 Helpful for learning trigonometry

**What reviewers complain about**

- 💰 Unclear upgrade value proposition
- 📊 Limited decimal place precision in free version
- 🔍 Insufficient feature differentiation between tiers
- ⚠️ Calculation accuracy issues reported

**Reported bugs**

- Incorrect calculation results in some cases

**Requested features**

- Better visual representation of triangles
- Clearer explanation of premium features
- Higher default decimal place precision
- More detailed feature descriptions for paid tiers


### Trigonometry(Math Drills)

[App page](https://appshunter.io/ios/app/trigonometrymath-drills/id1623896351)

Master trigonometry concepts offline with this educational app. It covers essential topics like the Pythagorean theorem, right triangles, special angles, and shape measurements. Challenge yourself to improve your rank and test your knowledge.

**Highlights:** Offline learning, Pythagorean theorem, Right triangle trigonometry, Coordinate trigonometry, Special angles, Shape measurements, Challenge Mode for ranking

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Trigonometry Help Lite free?

Trigonometry Help Lite is free to download, with in-app purchases available.

### Is Trigonometry(Math Drills) free?

Trigonometry(Math Drills) is free to download, with no in-app purchases.

### Do Trigonometry Help Lite or Trigonometry(Math Drills) have ads?

Neither Trigonometry Help Lite nor Trigonometry(Math Drills) shows ads.

### Which is updated more often, Trigonometry Help Lite or Trigonometry(Math Drills)?

Trigonometry Help Lite ships an update every 6 weeks, and Trigonometry(Math Drills) monthly. Most recently, Trigonometry Help Lite was updated on September 26, 2026 and Trigonometry(Math Drills) on August 4, 2026.

---

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