# KCFIR vs Feet warm

The clearest difference is iOS requirement: Feet warm at 9.0 against KCFIR's 12.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

KCFIR ships an update every 3 weeks, Feet warm every 6 weeks. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | KCFIR | Feet warm |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Size | 18 MB | 5 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Shenzhen Kang Cheng Century Technology Co., Ltd.](https://appshunter.io/developer/1448125513) | [Shenzhen Hongruixin Electronic Co.,Ltd](https://appshunter.io/developer/1532694202) |

## What reviewers say

### KCFIR

[App page](https://appshunter.io/ios/app/kcfir/id1448125514)

**In-app purchases:** none


### Feet warm

[App page](https://appshunter.io/ios/app/feet-warm/id1605113751)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KCFIR free?

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

### Is Feet warm free?

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

### Do KCFIR or Feet warm have ads?

Neither KCFIR nor Feet warm shows ads.

### Which is updated more often, KCFIR or Feet warm?

KCFIR ships an update every 3 weeks, and Feet warm every 6 weeks. Most recently, KCFIR was updated on October 26, 2026 and Feet warm on October 25, 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.*