Fourth Space vs B
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fourth Space
Control your air conditioner remotely with this app. Adjust temperature, fan speed, mode, and power settings for a convenient smart home experience.
- Remote air conditioner control
- Turn on/off AC
- Adjust temperature
- Set fan speed
- Change operating mode
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Use the Fourth Space APP to provide you with a convenient smart control experience. Through the APP, you can directly remotely control the air conditioner to turn on or off, and adjust the air conditioner's functions, wind speed, mode, temperature and other settings
B
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A unified control solution that brings Brizl and Buenofe together in one app. Seamlessly connect and manage your indoor and outdoor environments with a single application. Key Features 1. Real-Time Environment Monitoring • Carbon Monoxide (CO) Monitoring Monitor real-time carbon monoxide (CO) levels in ppm and instantly recognize potential risks through intuitive values and color indicators. • Temperature & Humidity Monitoring View the current temperature and humidity together on the main screen for a complete overview of your environment. 2. Device Status & Power Management • Battery Status Check the remaining battery level of your device in percentage (%) for reliable operation. • Remote Power Control Turn your device on or off remotely using the app. 3. Personalized Alarm Settings • Alarm Threshold Settings Choose from four sensitivity levels to configure the CO alarm threshold according to your environment. • High Temperature Alarm Enable or disable high-temperature alerts in addition to CO monitoring. • Sound Test Remotely test the device's alarm speaker directly from the app. 4. Display & Unit Options • Display Brightness Control Adjust the display brightness from Level 1 to Level 4 for comfortable viewing day or night. • Temperature Unit Switch freely between Celsius (°C) and Fahrenheit (°F).
Screenshots
Verdict
The clearest difference is update cadence: B at every 3 days against Fourth Space's fortnightly. B also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Fourth Space ships an update fortnightly, B every 3 days. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.
| Parameter | Fourth Space | B |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (3 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Fortnightly | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 31 MB |
| Age rating | 9+ | 4+ |
| Developer | 第肆空间(深圳)创新科技有限公司 | IN&OUT Co.,Ltd. |
In-app purchases
Fourth Space
No in-app purchases
B
No in-app purchases









