# xFractal vs SigiCalc

The clearest difference is update cadence: xFractal at every 6 weeks against SigiCalc's every 48 months. xFractal also leads on review sentiment (71% vs 50%). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

xFractal ships an update every 6 weeks, SigiCalc every 48 months. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | xFractal | SigiCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sigicalc/id522503444/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **71.4% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 48 months |
| Monetization | Free | Free |
| Size | 9 MB | 3 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jean Bovet](https://appshunter.io/developer/300642267) | [Siegware](https://appshunter.io/developer/443908611) |

## What reviewers say

### xFractal

[App page](https://appshunter.io/ios/app/xfractal/id300642264)

Explore the intricate beauty of fractals with real-time GPU rendering. Zoom infinitely into the Mandelbrot and Julia sets, discover various fractal types, and enjoy smooth coloring with multiple palettes. Replay your explorations as animated movies.

**Highlights:** Mandelbrot, Julia, Newton, and Multibrot fractals, Deep zoom capabilities, Multiple classic color palettes, Julia presets and Multibrot exponents, Exploration replay as animated movie, Cross-device continuity

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is xFractal free?

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

### Is SigiCalc free?

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

### Do xFractal or SigiCalc have ads?

Neither xFractal nor SigiCalc shows ads.

### Which is updated more often, xFractal or SigiCalc?

xFractal ships an update every 6 weeks, and SigiCalc every 48 months. Most recently, xFractal was updated on October 31, 2026 and SigiCalc on November 1, 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.*