# SigiCalc vs Unit Circle Calculator

The clearest difference is rating: SigiCalc at 5.0 against Unit Circle Calculator's 3.4. SigiCalc also leads on in-app purchases (none vs 8). Unit Circle Calculator's advantage is review sentiment (83% vs 50%) and update cadence (every 3 weeks vs every 48 months). 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. SigiCalc asks for nothing beyond the download.

SigiCalc holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: Unit Circle Calculator has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 50% of SigiCalc's written reviews are positive against 83% of Unit Circle Calculator's, so the app with the better star average is not the one people write more warmly about.

SigiCalc ships an update every 48 months, Unit Circle Calculator every 3 weeks. The most recent releases landed on September 3, 2026 and August 26, 2026 respectively.

## The numbers

| Metric | SigiCalc | Unit Circle Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sigicalc/id522503444/reviews)** | [3.4 (8 ratings)](https://appshunter.io/ios/app/unit-circle-calculator/id1606376248/reviews) |
| Number of ratings | 1 | **8** |
| Positive reviews | 50.0% of reviews | **83.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 48 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 182 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Siegware](https://appshunter.io/developer/443908611) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### SigiCalc

[App page](https://appshunter.io/ios/app/sigicalc/id522503444)

This app provides a graphical RPN calculator with an undo feature. Users can input mathematical equations and instantly visualize them with a plot. It's designed for simplicity and practicality in mathematical calculations.

**Highlights:** Graphical RPN calculator, Equation plotting, Undo functionality, Simple interface, Practical calculations

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

**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 SigiCalc free?

SigiCalc 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, SigiCalc or Unit Circle Calculator?

SigiCalc is rated higher. SigiCalc averages 5.0 out of 5 from 1 ratings, while Unit Circle Calculator averages 3.4 from 8 ratings.

### Do SigiCalc or Unit Circle Calculator have ads?

Neither SigiCalc nor Unit Circle Calculator shows ads.

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

SigiCalc ships an update every 48 months, and Unit Circle Calculator every 3 weeks. Most recently, SigiCalc was updated on September 3, 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.*