# YEJING Smart vs iDim

The clearest difference is update cadence: iDim 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, iDim every 7 months. The most recent releases landed on September 14, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | YEJING Smart | iDim |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 7 months** |
| Size | 151 MB | 188 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Suzhou Yejing Lighting Energy Saving Technology Co., Ltd](https://appshunter.io/developer/1597243002) | [Overseas Design Technology Company Limited](https://appshunter.io/developer/1782854018) |

## What reviewers say

### YEJING Smart

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

**Features:** macOS Compatibility

**In-app purchases:** none


### iDim

[App page](https://appshunter.io/ios/app/idim/id6738907345)

**In-app purchases:** none


## Frequently asked questions

### Is YEJING Smart free?

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

### Is iDim free?

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

### Do YEJING Smart or iDim have ads?

Neither YEJING Smart nor iDim shows ads.

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

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