# Scar Goniometry vs Unit Circle Calculator

The clearest difference is rating: Scar Goniometry at 5.0 against Unit Circle Calculator's 3.4. Scar Goniometry also leads on in-app purchases (none vs 8) and iOS requirement (10.0 vs 15.0). Unit Circle Calculator's advantage is update cadence (every 3 weeks vs every 6 months). On price, ratings volume, ads and device support there is nothing between them.

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

Scar Goniometry holds the better App Store score, 5.0 against 3.4. Both are backed by a comparable volume of ratings — 4 and 8 respectively.

Scar Goniometry ships an update every 6 months, Unit Circle Calculator every 3 weeks. The most recent releases landed on September 9, 2026 and August 26, 2026 respectively.

## The numbers

| Metric | Scar Goniometry | Unit Circle Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/scar-goniometry/id1457965538/reviews)** | [3.4 (8 ratings)](https://appshunter.io/ios/app/unit-circle-calculator/id1606376248/reviews) |
| Number of ratings | 4 | **8** |
| Positive reviews | — | 83.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 235 MB | 182 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Csymplicity Software Solutions Inc](https://appshunter.io/developer/943504062) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### Scar Goniometry

[App page](https://appshunter.io/ios/app/scar-goniometry/id1457965538)

This app serves as a guide for healthcare professionals to accurately measure joint range of motion and contractures in patients with cutaneous scarring, particularly those with burn injuries. It assists in proper patient positioning for precise measurements.

**Highlights:** Goniometry guide, Measure range of motion, Assess contractures, Aid for burn injury patients, Guidance on patient positioning

**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 Scar Goniometry free?

Scar Goniometry 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.

### Which has better reviews, Scar Goniometry or Unit Circle Calculator?

Scar Goniometry is rated higher. Scar Goniometry averages 5.0 out of 5 from 4 ratings, while Unit Circle Calculator averages 3.4 from 8 ratings.

### Do Scar Goniometry or Unit Circle Calculator have ads?

Neither Scar Goniometry nor Unit Circle Calculator shows ads.

### Which is updated more often, Scar Goniometry or Unit Circle Calculator?

Scar Goniometry ships an update every 6 months, and Unit Circle Calculator every 3 weeks. Most recently, Scar Goniometry was updated on September 9, 2026 and Unit Circle Calculator on August 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.*