# LS XSMART vs Check Engine

The clearest difference is in-app purchases: LS XSMART at none against Check Engine's 2. LS XSMART also leads on device support (3 vs 1). Check Engine's advantage is update cadence (every 2 weeks vs monthly). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Check Engine sells 2 in-app purchases, starting at $9.99 per month. LS XSMART asks for nothing beyond the download.

LS XSMART ships an update monthly, Check Engine every 2 weeks. The most recent releases landed on October 5, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | LS XSMART | Check Engine |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Size | 40 MB | 48 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Fujian Leisheng Energy Technology Co., Ltd.](https://appshunter.io/developer/1477159753) | [REIDT GAVIN WILDE](https://appshunter.io/developer/6787276656) |

## 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


### Check Engine

[App page](https://appshunter.io/ios/app/check-engine-ai-engine-agent/id6787276654)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $9.99 | per month |
| Shop | $29.99 | per month |


## Frequently asked questions

### Is LS XSMART free?

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

### Is Check Engine free?

Check Engine is free to download, with in-app purchases available.

### Do LS XSMART or Check Engine have ads?

Neither LS XSMART nor Check Engine shows ads.

### Which is updated more often, LS XSMART or Check Engine?

LS XSMART ships an update monthly, and Check Engine every 2 weeks. Most recently, LS XSMART was updated on October 5, 2026 and Check Engine on September 30, 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.*