# Darwin App vs Unit Circle Calculator

The clearest difference is in-app purchases: Darwin App at none against Unit Circle Calculator's 8. Darwin App also leads on iOS requirement (9.0 vs 15.0). Unit Circle Calculator's advantage is update cadence (every 3 weeks vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Unit Circle Calculator sells 8 one-off in-app purchases. Darwin App asks for nothing beyond the download.

Darwin App ships an update every 6 weeks, Unit Circle Calculator every 3 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Darwin App | Unit Circle Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.4 (8 ratings)](https://appshunter.io/ios/app/unit-circle-calculator/id1606376248/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | — | 83.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 1 MB | 182 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Garcia](https://appshunter.io/developer/967926151) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### Darwin App

[App page](https://appshunter.io/ios/app/darwin-app/id1248936797)

**Features:** macOS Compatibility

**In-app purchases:** none


### Unit Circle Calculator

[App page](https://appshunter.io/ios/app/unit-circle-calculator/id1606376248)

Visualize and understand the unit circle with step-by-step calculations, diagrams, and animations. Supports various input formats and saves your work in a history for easy access and sharing.

**Highlights:** Unit circle visualization, Step-by-step calculation explanations, Diagrams and animations, Supports negative, decimal, fraction, and π inputs, Calculation history, Shareable solutions

**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 |


## Frequently asked questions

### Is Darwin App free?

Darwin App is free to download, with no in-app purchases.

### Is Unit Circle Calculator free?

Unit Circle Calculator is free to download, with in-app purchases available.

### Do Darwin App or Unit Circle Calculator have ads?

Neither Darwin App nor Unit Circle Calculator shows ads.

### Which is updated more often, Darwin App or Unit Circle Calculator?

Darwin App ships an update every 6 weeks, and Unit Circle Calculator every 3 weeks. Most recently, Darwin App was updated on November 2, 2026 and Unit Circle Calculator on November 3, 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.*