# ISS calculator vs Mechanical Keyboard App－FunKey

The clearest difference is price: ISS calculator at Free against Mechanical Keyboard App－FunKey's $3.99. ISS calculator also leads on update cadence (every 3 days vs weekly) and iOS requirement (13.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

ISS calculator is free to download; Mechanical Keyboard App－FunKey costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ISS calculator ships an update every 3 days, Mechanical Keyboard App－FunKey weekly. The most recent releases landed on November 3, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | ISS calculator | Mechanical Keyboard App－FunKey |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/iss-calculator/id1531086115/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 73.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Weekly |
| Monetization | **Free** | Paid |
| Size | 2 MB | 45 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Sujal Adhia](https://appshunter.io/developer/1475334795) | [Digital Hole Pvt. Ltd.](https://appshunter.io/developer/917701060) |

## What reviewers say

### ISS calculator

[App page](https://appshunter.io/ios/app/iss-calculator/id1531086115)

This tool helps assess the severity and extent of ichthyosis across the body. It's designed for clinical trials, research, and practice to track treatment response in adults and children. The system follows FDA guidelines for comprehensive scoring.

**Highlights:** Assess ichthyosis extent and severity, User-friendly instrument, For clinical trials and research, Track treatment response, Score adults and children, Follows FDA guidelines

**Features:** macOS Compatibility

**In-app purchases:** none


### Mechanical Keyboard App－FunKey

[App page](https://appshunter.io/ios/app/mechanical-keyboard-appfunkey/id6469420677)

Enhance your typing with realistic mechanical keyboard sounds and haptic feedback. Choose from over 25 unique sound profiles to make every keystroke more satisfying on your iPhone.

**Highlights:** Custom iOS keyboard extension, Realistic mechanical keyboard sounds, Synchronized haptic feedback, 25+ unique sound profiles, Adjustable sound volume, On-device privacy

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

**In-app purchases:** none


## Frequently asked questions

### Is ISS calculator free?

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

### Is Mechanical Keyboard App－FunKey free?

Mechanical Keyboard App－FunKey costs $3.99, with no in-app purchases.

### Do ISS calculator or Mechanical Keyboard App－FunKey have ads?

Neither ISS calculator nor Mechanical Keyboard App－FunKey shows ads.

### Which is updated more often, ISS calculator or Mechanical Keyboard App－FunKey?

ISS calculator ships an update every 3 days, and Mechanical Keyboard App－FunKey weekly. Most recently, ISS calculator was updated on November 3, 2026 and Mechanical Keyboard App－FunKey on November 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*