# EYSK Calculator & Converter vs Math Sphere

The clearest difference is update cadence: EYSK Calculator & Converter at every 5 days against Math Sphere's every 3 weeks. Math Sphere's advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

EYSK Calculator & Converter ships an update every 5 days, Math Sphere every 3 weeks. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | EYSK Calculator & Converter | Math Sphere |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/eysk-calculator-and-converter/id1620029636/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Monetization | Free | — |
| Size | 3 MB | 25 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kiseon Cho](https://appshunter.io/developer/1609478221) | [otsuki hayato](https://appshunter.io/developer/1828600192) |

## What reviewers say

### EYSK Calculator & Converter

[App page](https://appshunter.io/ios/app/eysk-calculator-and-converter/id1620029636)

This app offers a powerful yet simple calculator with a clean interface for iOS devices. It provides mathematical, scientific, and conversion functions, with real-time result updates and support for multi-step expressions. Customize your experience with seven color options.

**Highlights:** Intuitive and smart calculator, Mathematical, scientific, and conversion functions, Real-time result updates, Support for multi-step expressions, Four practical tabs: General, Advanced, Constants, and Convert, Customizable color options

**Features:** Vision Pro support

**In-app purchases:** none


### Math Sphere

[App page](https://appshunter.io/ios/app/math-sphere/id6749747366)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EYSK Calculator & Converter free?

EYSK Calculator & Converter is free to download, with no in-app purchases.

### Is Math Sphere free?

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

### Do EYSK Calculator & Converter or Math Sphere have ads?

Neither EYSK Calculator & Converter nor Math Sphere shows ads.

### Which is updated more often, EYSK Calculator & Converter or Math Sphere?

EYSK Calculator & Converter ships an update every 5 days, and Math Sphere every 3 weeks. Most recently, EYSK Calculator & Converter was updated on November 7, 2026 and Math Sphere on October 30, 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.*