# Karbon vs Sounds Good

The clearest difference is iOS requirement: Karbon at 12.0 against Sounds Good's 15.6. 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.

Karbon ships an update every 3 weeks, Sounds Good monthly. The most recent releases landed on October 14, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Karbon | Sounds Good |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free | — |
| Size | 25 MB | 187 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Kang Cheng Century Technology Co., Ltd.](https://appshunter.io/developer/1448125513) | [Rotule Inc](https://appshunter.io/developer/1836056586) |

## What reviewers say

### Karbon

[App page](https://appshunter.io/ios/app/karbon/id1602033747)

Control your heated socks via Bluetooth. Adjust heating levels, activate standby mode, and monitor battery status. You can also personalize the names of your sock batteries.

**Highlights:** Bluetooth sock control, 3 heating levels, Standby mode, Battery status display, Customizable battery names

**In-app purchases:** none


### Sounds Good

[App page](https://appshunter.io/ios/app/sounds-good/id6751611087)

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

**In-app purchases:** none


## Frequently asked questions

### Is Karbon free?

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

### Is Sounds Good free?

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

### Do Karbon or Sounds Good have ads?

Neither Karbon nor Sounds Good shows ads.

### Which is updated more often, Karbon or Sounds Good?

Karbon ships an update every 3 weeks, and Sounds Good monthly. Most recently, Karbon was updated on October 14, 2026 and Sounds Good on October 28, 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.*