# LS XSMART vs KarstCharge

The clearest difference is update cadence: KarstCharge at every 4 days against LS XSMART's monthly. KarstCharge also leads on iOS requirement (13.0 vs 15.1). 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.

LS XSMART ships an update monthly, KarstCharge every 4 days. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | LS XSMART | KarstCharge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Size | 40 MB | 65 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Fujian Leisheng Energy Technology Co., Ltd.](https://appshunter.io/developer/1477159753) | [Karstcom Tech (Shenzhen)](https://appshunter.io/developer/1845292130) |

## What reviewers say

### LS XSMART

[App page](https://appshunter.io/ios/app/ls-xsmart/id6744953568)

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

**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 LS XSMART free?

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

### Is KarstCharge free?

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

### Do LS XSMART or KarstCharge have ads?

Neither LS XSMART nor KarstCharge shows ads.

### Which is updated more often, LS XSMART or KarstCharge?

LS XSMART ships an update monthly, and KarstCharge every 4 days. Most recently, LS XSMART was updated on October 5, 2026 and KarstCharge on October 3, 2026.

---

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