# YEJING Smart vs KeiltonEM

The clearest difference is update cadence: KeiltonEM at every 7 months against YEJING Smart's every 25 months. 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.

YEJING Smart ships an update every 25 months, KeiltonEM every 7 months. The most recent releases landed on September 14, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | YEJING Smart | KeiltonEM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 7 months** |
| Size | 151 MB | 25 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Suzhou Yejing Lighting Energy Saving Technology Co., Ltd](https://appshunter.io/developer/1597243002) | [Litetrace Inc](https://appshunter.io/developer/1685148777) |

## What reviewers say

### YEJING Smart

[App page](https://appshunter.io/ios/app/yejing-smart/id1597243000)

**Features:** macOS Compatibility

**In-app purchases:** none


### KeiltonEM

[App page](https://appshunter.io/ios/app/keiltonem/id6744957921)

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

**In-app purchases:** none


## Frequently asked questions

### Is YEJING Smart free?

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

### Is KeiltonEM free?

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

### Do YEJING Smart or KeiltonEM have ads?

Neither YEJING Smart nor KeiltonEM shows ads.

### Which is updated more often, YEJING Smart or KeiltonEM?

YEJING Smart ships an update every 25 months, and KeiltonEM every 7 months. Most recently, YEJING Smart was updated on September 14, 2026 and KeiltonEM on September 13, 2026.

---

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