# Smart clean robot vs J20

Smart clean robot and J20 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Smart clean robot ships an update every 4 days, J20 every 3 days. The most recent releases landed on September 20, 2026 and August 23, 2026 respectively.

## The numbers

| Metric | Smart clean robot | J20 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 3 days** |
| Size | 68 MB | 59 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [岩岩 丁](https://appshunter.io/developer/1669398076) | [南京辉煌智行科技有限公司](https://appshunter.io/developer/1738384876) |

## What reviewers say

### Smart clean robot

[App page](https://appshunter.io/ios/app/smart-clean-robot/id6762189500)

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

**In-app purchases:** none


### J20

[App page](https://appshunter.io/ios/app/j20/id6795382293)

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

**In-app purchases:** none


## Frequently asked questions

### Is Smart clean robot free?

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

### Is J20 free?

J20 is free to download, with no in-app purchases.

### Do Smart clean robot or J20 have ads?

Neither Smart clean robot nor J20 shows ads.

### Which is updated more often, Smart clean robot or J20?

Smart clean robot ships an update every 4 days, and J20 every 3 days. Most recently, Smart clean robot was updated on September 20, 2026 and J20 on August 23, 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.*