# SDJ vs Lydsto

The clearest difference is rating: SDJ at 3.4 against Lydsto's 2.0. SDJ also leads on iOS requirement (9.0 vs 13.0). Lydsto's advantage is ratings volume (47 vs 5). On price, review sentiment, update cadence and ads there is nothing between them.

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

SDJ holds the better App Store score, 3.4 against 2.0. That said, the two scores are not equally well evidenced: Lydsto has 47 ratings behind it against 5, so its average is the more settled of the two. Written reviews split almost evenly too, at 11% and 11% positive.

SDJ ships an update fortnightly, Lydsto every 3 weeks. The most recent releases landed on September 6, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | SDJ | Lydsto |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (5 ratings)](https://appshunter.io/ios/app/sdj/id1500362834/reviews)** | [2.0 (47 ratings)](https://appshunter.io/ios/app/lydsto/id1540049334/reviews) |
| Number of ratings | 5 | **47** |
| Positive reviews | **11.1% of reviews** | 10.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free | Free |
| Size | 49 MB | 182 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tianlang innovation Technology (Shenzhen) Co.,Ltd.](https://appshunter.io/developer/1383171492) | [Wuhan Smartda Electronic Technology Co Ltd.](https://appshunter.io/developer/1540049336) |

## What reviewers say

### SDJ

[App page](https://appshunter.io/ios/app/sdj/id1500362834)

This smart sweeping robot offers integrated dust collection, sweeping, and mopping functions for smooth, flat surfaces. It operates quietly, providing efficient, hands-free cleaning with long battery life to create a comfortable living space.

**Highlights:** Intelligent electric universal driving, Dust collection, Sweeping, Mopping, Low noise operation, Long endurance

**Features:** macOS Compatibility

**In-app purchases:** none


### Lydsto

[App page](https://appshunter.io/ios/app/lydsto/id1540049334)

Control your Lydsto robot cleaner remotely. Monitor cleaning progress in real-time and customize cleaning schedules and areas for a consistently clean home.

**Highlights:** Remote functional control, Real-time cleaning dynamics, Automatic environmental detection, Dynamic route planning, Customized area planning, Personalized cleaning modes

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

**In-app purchases:** none


## Frequently asked questions

### Is SDJ free?

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

### Is Lydsto free?

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

### Which has better reviews, SDJ or Lydsto?

SDJ is rated higher. SDJ averages 3.4 out of 5 from 5 ratings, while Lydsto averages 2.0 from 47 ratings.

### Do SDJ or Lydsto have ads?

Neither SDJ nor Lydsto shows ads.

### Which is updated more often, SDJ or Lydsto?

SDJ ships an update fortnightly, and Lydsto every 3 weeks. Most recently, SDJ was updated on September 6, 2026 and Lydsto on September 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.*