# Unit Circle Calculator PRO vs Learn to Code with Erlang

The clearest difference is update cadence: Learn to Code with Erlang at every 6 days against Unit Circle Calculator PRO's monthly. Learn to Code with Erlang also leads on iOS requirement (12.0 vs 15.0). Unit Circle Calculator PRO's advantage is price ($1.99 vs $3.99). On ads, in-app purchases and device support there is nothing between them.

Unit Circle Calculator PRO costs $1.99 and Learn to Code with Erlang $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Unit Circle Calculator PRO ships an update monthly, Learn to Code with Erlang every 6 days. The most recent releases landed on October 25, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Unit Circle Calculator PRO | Learn to Code with Erlang |
| --- | --- | --- |
| Price | **$1.99** | $3.99 |
| Rating | **[4.7 (25 ratings)](https://appshunter.io/ios/app/unit-circle-calculator-pro/id1606376541/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 6 days** |
| Monetization | Paid | — |
| Size | 181 MB | 48 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) | [Shahbaz Khan](https://appshunter.io/developer/1479963383) |

## What reviewers say

### Unit Circle Calculator PRO

[App page](https://appshunter.io/ios/app/unit-circle-calculator-pro/id1606376541)

Visualize and understand the unit circle with step-by-step calculations, diagrams, and animations. Supports various input formats including negative values, decimals, fractions, and pi. Save, share, and revisit past calculations.

**Highlights:** Unit circle visualization, Step-by-step calculation, Diagrams and animations, Supports negative values, decimals, fractions, and π, Calculation history, Shareable solutions

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

**In-app purchases:** none


### Learn to Code with Erlang

[App page](https://appshunter.io/ios/app/learn-to-code-with-erlang/id6752514017)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Unit Circle Calculator PRO free?

Unit Circle Calculator PRO costs $1.99, with no in-app purchases.

### Is Learn to Code with Erlang free?

Learn to Code with Erlang costs $3.99, with no in-app purchases.

### Do Unit Circle Calculator PRO or Learn to Code with Erlang have ads?

Neither Unit Circle Calculator PRO nor Learn to Code with Erlang shows ads.

### Which is updated more often, Unit Circle Calculator PRO or Learn to Code with Erlang?

Unit Circle Calculator PRO ships an update monthly, and Learn to Code with Erlang every 6 days. Most recently, Unit Circle Calculator PRO was updated on October 25, 2026 and Learn to Code with Erlang on October 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*