# SDJ vs ROJECO

The clearest difference is review sentiment: ROJECO at 55% against SDJ's 11%. ROJECO also leads on rating (4.8 vs 3.4) and ratings volume (328 vs 5). SDJ's advantage is update cadence (fortnightly vs every 16 months) and iOS requirement (9.0 vs 14.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

ROJECO holds the better App Store score, 4.8 against 3.4. That said, the two scores are not equally well evidenced: ROJECO has 328 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 11% of SDJ's written reviews are positive against 55% of ROJECO's.

SDJ ships an update fortnightly, ROJECO every 16 months. The most recent releases landed on September 6, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | SDJ | ROJECO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (5 ratings)](https://appshunter.io/ios/app/sdj/id1500362834/reviews) | **[4.8 (328 ratings)](https://appshunter.io/ios/app/rojeco/id1609197918/reviews)** |
| Number of ratings | 5 | **328** |
| Positive reviews | 11.1% of reviews | **54.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 16 months |
| Monetization | Free | Free |
| Size | 49 MB | 207 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Tianlang innovation Technology (Shenzhen) Co.,Ltd.](https://appshunter.io/developer/1383171492) | [Nanchang YueLing Technology Co., Ltd](https://appshunter.io/developer/1609197920) |

## 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


### ROJECO

[App page](https://appshunter.io/ios/app/rojeco/id1609197918)

Manage your pet's intelligent life with this app. It offers remote control for devices, scientific feeding schedules, and the ability to manage multiple smart pet gadgets simultaneously. Share access with family for a connected pet care experience.

**Highlights:** Remote device control, Manage multiple smart devices, Scientific feeding schedules, One-click device sharing, Fast networking

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use and functional
- 👍 Great convenience for pet feeding
- 👍 Reliable and eliminates worry
- 👍 Helpful for managing pet meals
- 👍 Intuitive app design

**What reviewers complain about**

- 🐛 App crashes or freezes sometimes
- 🐛 App doesn't connect at all
- 🐛 Buttons are greyed out
- 🐛 Unable to log in after update
- 🐛 Device not responding with Alexa

**Reported bugs**

- App update caused login errors
- All buttons greyed out, requires update that isn't available
- Alexa integration not working
- Device not appearing in assignment list for Alexa scenes

**Requested features**

- Alert mobile when food is low
- Allow more than 10 doses of food per day
- Implement Siri shortcuts integration
- Connect devices with Alexa
- Option to disable animations for accessibility


## Frequently asked questions

### Is SDJ free?

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

### Is ROJECO free?

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

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

ROJECO is rated higher. SDJ averages 3.4 out of 5 from 5 ratings, while ROJECO averages 4.8 from 328 ratings.

### Do SDJ or ROJECO have ads?

Neither SDJ nor ROJECO shows ads.

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

SDJ ships an update fortnightly, and ROJECO every 16 months. Most recently, SDJ was updated on September 6, 2026 and ROJECO on September 24, 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.*