# Trigonometry Help Lite vs Right Triangle

The clearest difference is rating: Trigonometry Help Lite at 4.7 against Right Triangle's 3.8. Trigonometry Help Lite also leads on ratings volume (768 vs 6) and iOS requirement (11.0 vs 15.0). Right Triangle's advantage is update cadence (every 3 weeks vs every 6 weeks). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Trigonometry Help Lite sells 3 one-off in-app purchases and Right Triangle sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Trigonometry Help Lite holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: Trigonometry Help Lite has 768 ratings behind it against 6, so its average is the more settled of the two.

Trigonometry Help Lite ships an update every 6 weeks, Right Triangle every 3 weeks. The most recent releases landed on September 26, 2026 and August 26, 2026 respectively.

## The numbers

| Metric | Trigonometry Help Lite | Right Triangle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (768 ratings)](https://appshunter.io/ios/app/trigonometry-help-lite/id1465685523/reviews)** | [3.8 (6 ratings)](https://appshunter.io/ios/app/right-triangle-calculator/id1567415770/reviews) |
| Number of ratings | **768** | 6 |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 17 MB | 180 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Armchair Engineering](https://appshunter.io/developer/398901339) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## 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


### Right Triangle

[App page](https://appshunter.io/ios/app/right-triangle-calculator/id1567415770)

Instantly solve geometry homework and prepare for exams with this free calculator. It provides complete step-by-step solutions for all triangle quantities, including legs, hypotenuse, height, angles, perimeter, and area. Access learning videos and manage your solutions.

**Highlights:** Step-by-step solutions, Calculates legs, hypotenuse, height, angles, perimeter, area, Supports all length units, Curated learning videos, Feedback on incorrect inputs, Manage saved solutions

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +30 User Tokens | $0.29 | one-time |
| +1 Convenience Token / 6h, max. +2 | $0.59 | one-time |
| +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time |
| +150 User Tokens | $0.99 | one-time |
| +300 User Tokens | $1.49 | one-time |
| +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time |
| Remove Ads | $2.99 | one-time |
| Lifetime Access | $2.99 | one-time |


## Frequently asked questions

### Is Trigonometry Help Lite free?

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

### Is Right Triangle free?

Right Triangle is free to download, with in-app purchases available.

### Which has better reviews, Trigonometry Help Lite or Right Triangle?

Trigonometry Help Lite is rated higher. Trigonometry Help Lite averages 4.7 out of 5 from 768 ratings, while Right Triangle averages 3.8 from 6 ratings.

### Do Trigonometry Help Lite or Right Triangle have ads?

Neither Trigonometry Help Lite nor Right Triangle shows ads.

### Which is updated more often, Trigonometry Help Lite or Right Triangle?

Trigonometry Help Lite ships an update every 6 weeks, and Right Triangle every 3 weeks. Most recently, Trigonometry Help Lite was updated on September 26, 2026 and Right Triangle on August 26, 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.*