# PocketCAS vs Trigonometry!

The clearest difference is review sentiment: PocketCAS at 91% against Trigonometry!'s 14%. PocketCAS also leads on rating (4.6 vs 2.0) and ratings volume (204 vs 4). Trigonometry!'s advantage is iOS requirement (9.0 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. PocketCAS sells 1 one-off in-app purchase and Trigonometry! sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

PocketCAS holds the better App Store score, 4.6 against 2.0. That said, the two scores are not equally well evidenced: PocketCAS has 204 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 91% of PocketCAS's written reviews are positive against 14% of Trigonometry!'s.

PocketCAS ships an update every 3 months, Trigonometry! every 4 months. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | PocketCAS | Trigonometry! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (204 ratings)](https://appshunter.io/ios/app/pocketcas-graphing-calculator/id517249689/reviews)** | [2.0 (4 ratings)](https://appshunter.io/ios/app/trigonometry/id1236663817/reviews) |
| Number of ratings | **204** | 4 |
| Positive reviews | **90.8% of reviews** | 14.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free | Free |
| Size | 42 MB | 29 MB |
| Requires iOS | 18.0 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Timing Software GmbH](https://appshunter.io/developer/333261118) | [AppCrab](https://appshunter.io/developer/1227198215) |

## What reviewers say

### PocketCAS

[App page](https://appshunter.io/ios/app/pocketcas-graphing-calculator/id517249689)

This advanced math application assists with a wide range of mathematical problems, from basic arithmetic to calculus, algebra, and statistics. It functions as a graphing calculator replacement, aids in homework, and supports complex calculations for academic and professional use.

**Highlights:** 2D and 3D plotting, Calculus functions (limits, derivatives), Linear algebra operations, Equation solving, Scripting language, Physical units and constants, iCloud sync

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PocketCAS Pro | $29.99 | one-time |

**What reviewers like**

- 👍 Intuitive and user-friendly interface
- 📊 Excellent graphing capabilities with 3D visualization
- 💰 Free version available with substantial features
- 🧮 Powerful mathematical computation engine
- 📱 Convenient mobile alternative to expensive calculators

**What reviewers complain about**

- 🐛 Recent updates cause crashes on older documents
- 💸 Expensive compared to free alternatives
- 🔒 Limited free version functionality
- 🎮 Clunky interface in some areas
- ❌ Cannot plot certain advanced functions

**Reported bugs**

- App crashes when loading previously saved documents
- Crashes with no error feedback or debugging information
- Cannot plot certain mathematical functions
- Zoom scaling issues with 3D graphs (scales Z-axis incorrectly)
- Compatibility broken with iOS 6 after iOS 7 update

**Requested features**

- Dark theme/dark mode for UI
- Multiple polynomials on single graph
- Inverse button functionality
- Better zoom functionality for 3D graphs
- Improved documentation and tutorials


### Trigonometry!

[App page](https://appshunter.io/ios/app/trigonometry/id1236663817)

Master trigonometry with this comprehensive mobile helper. It offers a textbook, visual explanations, and video lessons covering all essential formulas and theorems. Prepare for your exams with detailed content and easy-to-understand explanations.

**Highlights:** Ordered set of basic formulas and theorems, 172 video lessons, Easy-to-read and understand textbook, Covers major trigonometry topics, Visual explanations

**Features:** macOS Compatibility

**In-app purchases (1)**

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


## Frequently asked questions

### Is PocketCAS free?

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

### Is Trigonometry! free?

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

### Which has better reviews, PocketCAS or Trigonometry!?

PocketCAS is rated higher. PocketCAS averages 4.6 out of 5 from 204 ratings, while Trigonometry! averages 2.0 from 4 ratings.

### Do PocketCAS or Trigonometry! have ads?

Neither PocketCAS nor Trigonometry! shows ads.

### Which is updated more often, PocketCAS or Trigonometry!?

PocketCAS ships an update every 3 months, and Trigonometry! every 4 months. Most recently, PocketCAS was updated on October 24, 2026 and Trigonometry! on October 6, 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.*