# DSDWebsocketConfig vs KarstCharge

The clearest difference is update cadence: KarstCharge at every 4 days against DSDWebsocketConfig's every 3 months. DSDWebsocketConfig's advantage is iOS requirement (9.0 vs 13.0). 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.

DSDWebsocketConfig ships an update every 3 months, KarstCharge every 4 days. Both last shipped on October 3, 2026.

## The numbers

| Metric | DSDWebsocketConfig | KarstCharge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Size | 2 MB | 65 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Zhangjiagang Uchen New Energy Technology Co.,Ltd](https://appshunter.io/developer/1796077004) | [Karstcom Tech (Shenzhen)](https://appshunter.io/developer/1845292130) |

## What reviewers say

### DSDWebsocketConfig

[App page](https://appshunter.io/ios/app/dsdwebsocketconfig/id1551250290)

**Features:** macOS Compatibility

**In-app purchases:** none


### KarstCharge

[App page](https://appshunter.io/ios/app/karstcharge/id6753860855)

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

**In-app purchases:** none


## Frequently asked questions

### Is DSDWebsocketConfig free?

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

### Is KarstCharge free?

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

### Do DSDWebsocketConfig or KarstCharge have ads?

Neither DSDWebsocketConfig nor KarstCharge shows ads.

### Which is updated more often, DSDWebsocketConfig or KarstCharge?

DSDWebsocketConfig ships an update every 3 months, and KarstCharge every 4 days. Most recently, DSDWebsocketConfig was updated on October 3, 2026 and KarstCharge on October 3, 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.*