# Pythagoras Calculator vs Trigonometry Help Lite

The clearest difference is update cadence: Pythagoras Calculator at every 3 weeks against Trigonometry Help Lite's every 6 weeks. Trigonometry Help Lite's advantage is ratings volume (768 vs 242) and iOS requirement (11.0 vs 15.0). On price, rating, review sentiment and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.6 for Pythagoras Calculator against 4.7 for Trigonometry Help Lite. Both are backed by a comparable volume of ratings — 242 and 768 respectively. Written reviews are what separate them: 83% of Pythagoras Calculator's written reviews are positive against 88% of Trigonometry Help Lite's.

Pythagoras Calculator ships an update every 3 weeks, Trigonometry Help Lite every 6 weeks. Both last shipped on September 26, 2026.

## The numbers

| Metric | Pythagoras Calculator | Trigonometry Help Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (242 ratings)](https://appshunter.io/ios/app/pythagoras-calculator/id1270384222/reviews) | **[4.7 (768 ratings)](https://appshunter.io/ios/app/trigonometry-help-lite/id1465685523/reviews)** |
| Number of ratings | 242 | **768** |
| Positive reviews | 83.0% of reviews | **87.5% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 179 MB | 17 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) | [Armchair Engineering](https://appshunter.io/developer/398901339) |

## What reviewers say

### Pythagoras Calculator

[App page](https://appshunter.io/ios/app/pythagoras-calculator/id1270384222)

Easily calculate any side of a right-angled triangle using the Pythagorean theorem. Input two sides to find the third, with all calculations saved in a history. Supports fractions and offers an ad-free option.

**Highlights:** Pythagorean theorem calculations, Calculate any of the three sides, History of calculations, Supports fraction input, Shareable solutions, Ad-free option

**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 | $1.99 | one-time |
| Lifetime Access | $1.99 | one-time |

**What reviewers like**

- 👍 Easy to use and simple interface
- ✅ Accurate calculations for Pythagorean theorem
- 📚 Shows step-by-step solutions for learning
- 🚀 Fast and efficient computation
- 💼 Useful for construction and woodworking projects

**What reviewers complain about**

- 📢 Intrusive and annoying advertisements
- 💳 Deceptive payment practices and fraudulent charges
- 🔐 Suspicious credit card requirements for access
- ⚠️ Forced rating prompts
- ❌ Limited functionality (only works with 2 known sides)

**Reported bugs**

- App crashes or fails to calculate
- Paid ad removal not working properly
- Fraudulent payment processing through third-party sites
- Occasional incorrect calculation results
- App not functioning on iPhone 5SE and older devices

**Requested features**

- Calculate triangle angles
- Support angle-based calculations with one side
- Better monetization without aggressive ads
- Improved ratings system
- Real-time results display


### 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 Pythagoras Calculator free?

Pythagoras Calculator 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, Pythagoras Calculator or Trigonometry Help Lite?

Trigonometry Help Lite is rated higher. Pythagoras Calculator averages 4.6 out of 5 from 242 ratings, while Trigonometry Help Lite averages 4.7 from 768 ratings.

### Do Pythagoras Calculator or Trigonometry Help Lite have ads?

Neither Pythagoras Calculator nor Trigonometry Help Lite shows ads.

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

Pythagoras Calculator ships an update every 3 weeks, and Trigonometry Help Lite every 6 weeks. Most recently, Pythagoras Calculator was updated on September 26, 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.*