# PocketCAS vs Trigonometry

The clearest difference is review sentiment: PocketCAS at 91% against Trigonometry's 0%. PocketCAS also leads on rating (4.6 vs 1.0) and ratings volume (204 vs 4). Trigonometry's advantage is in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 3 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. PocketCAS sells 1 one-off in-app purchase. Trigonometry asks for nothing beyond the download.

PocketCAS holds the better App Store score, 4.6 against 1.0. 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 0% of Trigonometry's.

PocketCAS ships an update every 3 months, Trigonometry every 2 weeks. The most recent releases landed on October 29, 2026 and September 22, 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)** | [1.0 (4 ratings)](https://appshunter.io/ios/app/trigonometry/id1550614008/reviews) |
| Number of ratings | **204** | 4 |
| Positive reviews | **90.8% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 42 MB | 9 MB |
| Requires iOS | 18.0 | **13.4** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Timing Software GmbH](https://appshunter.io/developer/333261118) | [Konstantinos Anagnostou](https://appshunter.io/developer/1550614010) |

## 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, iPhone Duo support

**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/id1550614008)

Learn basic trigonometric formulas through interactive theory and fun games. Earn points to progress through levels and master the concepts.

**Highlights:** Memorize basic trigonometric formulas, Interactive theory section, Four included games, Earn points to advance levels, Beginner-friendly

**Features:** macOS Compatibility

**In-app purchases:** none


## 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 no in-app purchases.

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

PocketCAS is rated higher. PocketCAS averages 4.6 out of 5 from 204 ratings, while Trigonometry averages 1.0 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 2 weeks. Most recently, PocketCAS was updated on October 29, 2026 and Trigonometry on September 22, 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.*