# Trigonometry calc vs Trigonometry Help Lite

The clearest difference is review sentiment: Trigonometry Help Lite at 88% against Trigonometry calc's 0%. Trigonometry Help Lite also leads on rating (4.7 vs 3.0) and ads (none vs shown). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Trigonometry calc sells 1 one-off in-app purchase and Trigonometry Help Lite sells 3 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 3.0. That said, the two scores are not equally well evidenced: Trigonometry Help Lite has 768 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of Trigonometry calc's written reviews are positive against 88% of Trigonometry Help Lite's.

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

## The numbers

| Metric | Trigonometry calc | Trigonometry Help Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/trigonometry-calc/id1306864057/reviews) | **[4.7 (768 ratings)](https://appshunter.io/ios/app/trigonometry-help-lite/id1465685523/reviews)** |
| Number of ratings | 2 | **768** |
| Positive reviews | 0.0% of reviews | **87.5% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 10 MB | 17 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bo Kalvslund](https://appshunter.io/developer/572272193) | [Armchair Engineering](https://appshunter.io/developer/398901339) |

## What reviewers say

### Trigonometry calc

[App page](https://appshunter.io/ios/app/trigonometry-calc/id1306864057)

Calculate side lengths and angles in right-angled triangles using Pythagorean theorem and trigonometry functions. Learn basic trigonometry concepts. An optional premium version removes ads and unlocks a general triangle calculator.

**Highlights:** Calculate side lengths, Calculate angles, Pythagorean Theorem, Trigonometry functions, Learn simple trigonometry, General triangle calculator (premium)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $0.99 | one-time |


### 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


## Frequently asked questions

### Is Trigonometry calc free?

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

### Is Trigonometry Help Lite free?

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

### Which has better reviews, Trigonometry calc or Trigonometry Help Lite?

Trigonometry Help Lite is rated higher. Trigonometry calc averages 3.0 out of 5 from 2 ratings, while Trigonometry Help Lite averages 4.7 from 768 ratings.

### Do Trigonometry calc or Trigonometry Help Lite have ads?

Trigonometry calc shows ads; Trigonometry Help Lite does not.

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

Trigonometry calc ships an update every 3 months, and Trigonometry Help Lite every 6 weeks. Most recently, Trigonometry calc was updated on September 6, 2026 and Trigonometry Help Lite on September 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.*