# CENGCEN vs Sight Bulb

The clearest difference is rating: Sight Bulb at 2.8 against CENGCEN's 2.2. Sight Bulb also leads on ratings volume (123 vs 16). CENGCEN's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, review sentiment, update cadence and in-app purchases there is nothing between them.

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

Sight Bulb holds the better App Store score, 2.8 against 2.2. That said, the two scores are not equally well evidenced: Sight Bulb has 123 ratings behind it against 16, so its average is the more settled of the two. Written reviews split almost evenly too, at 10% and 10% positive.

CENGCEN ships an update every 3 weeks, Sight Bulb every 2 weeks. The most recent releases landed on September 8, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | CENGCEN | Sight Bulb |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.2 (16 ratings)](https://appshunter.io/ios/app/cengcen/id1516210428/reviews) | **[2.8 (123 ratings)](https://appshunter.io/ios/app/sight-bulb/id1662795157/reviews)** |
| Number of ratings | 16 | **123** |
| Positive reviews | 10.0% of reviews | **10.2% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 68 MB | 207 MB |
| Requires iOS | 9.0 | 9.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dongguan Langmeng Intelligent Technology Co. Ltd.](https://appshunter.io/developer/1450147870) | [Continuum Holdings, LLC](https://appshunter.io/developer/1511066909) |

## What reviewers say

### CENGCEN

[App page](https://appshunter.io/ios/app/cengcen/id1516210428)

Monitor and interact with your pets remotely using this mobile client for a smart pet snack machine. Watch your pets live, communicate with them, and dispense treats from anywhere.

**Highlights:** Remote pet monitoring, Live video feed, Two-way audio communication, Remote treat dispensing, Pet interaction interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Sight Bulb

[App page](https://appshunter.io/ios/app/sight-bulb/id1662795157)

Monitor your home and family remotely with live HD video streaming and two-way audio. Receive instant motion alerts and review recorded video history to stay connected and secure.

**Highlights:** HD Live Streaming, Two-Way Audio, Motion Alerts, Home/Away Assist, Camera Sharing, Video History

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 💡 Great concept/idea
- 👍 Camera follows movement
- 👍 Decent video quality
- 👍 Loud siren
- 👍 Pan and zoom capabilities

**What reviewers complain about**

- 🐛 App frequently crashes
- 🐛 App frequently offline
- 🐛 Cannot connect to WiFi
- 🐛 No notifications
- 🐛 Difficult to set up

**Reported bugs**

- App crashes frequently
- App is often offline
- Cannot connect to WiFi
- No notifications received
- Account creation fails

**Requested features**

- Allow multiple users on one account
- Improve notification reliability for iPhones
- Add option to adjust siren volume
- Fix light timer glitch
- Improve motion tracking accuracy for humans


## Frequently asked questions

### Is CENGCEN free?

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

### Is Sight Bulb free?

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

### Which has better reviews, CENGCEN or Sight Bulb?

Sight Bulb is rated higher. CENGCEN averages 2.2 out of 5 from 16 ratings, while Sight Bulb averages 2.8 from 123 ratings.

### Do CENGCEN or Sight Bulb have ads?

Sight Bulb shows ads; CENGCEN does not.

### Which is updated more often, CENGCEN or Sight Bulb?

CENGCEN ships an update every 3 weeks, and Sight Bulb every 2 weeks. Most recently, CENGCEN was updated on September 8, 2026 and Sight Bulb on September 18, 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.*