b vs Smart Charge HK
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
b
Control and monitor your smart air purifiers remotely. Manage power, set timers, and adjust fan speed for optimal indoor air quality. Requires compatible device connection.
- Connect/disconnect mobile device
- Switch air purifier on/off
- Control turbo power
- Set automatic timer
- Remote monitoring
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RHT Industries Limited is a company that specializes in air purification technology. It invented the NCCO Air Purification Technology with the Member of HKUST Entrepreneurship Program and holds the patent. Over the years, RHT Industries Limited has formulated IAQ (Indoor Air Quality) together with Hong Kong Environmental Protection Department and still in use today, has offered a professional and efficient advisory service of air purification and air treatment for Hong Kong Hospital Authority, Hong Kong Housing Authority, Hong Kong International Airport, DoubleTree by Hilton, HSBC, Philips, Oregon Scientific, Poly Group and other organizations and firms. The b-MOLA application connects BM50, BM100, BM150 and BM300 to your mobile device. It manages and monitors features of the devices listed above. Use the b-MOLA application to set ip and manage the following. Features: - Connect to and disconnect from a mobile device - Switch on and off the air purifier - Control the turbo power of the air purifier - Set a timer for the air purifier to switch on and off automatically * Settings and features provided by the b-MOLA application are only available when BM50, BM100, BM150, BM300 is/are connected to your mobile device. Features will not work properly without a proper connection between BM50/ BM100/ BM150/ BM300 and your mobile device. * This application is only for BM50, BM100, BM150 and BM300. * For any questions, please contact us via the web page below. (https://www.bmola.hk/faq)
Smart Charge HK
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Smart Charge app provides an easy view & manages of your Smart Charge account anywhere and anytime. Smart Charge手機應用程式使你可以隨時隨地查閱及管理你的Smart Charge賬戶 Major Features 主要功能: - Check account status & balance 查閱賬戶狀況 - Check latest 3 months' bills 查閱最近3個月的賬單 - Check your charging status at a glance 查閱充電記錄 - Locate the nearest Smart Charge charging stations 尋找最近充電站位置
Screenshots
Verdict
b and Smart Charge HK 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.
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.
b ships an update every 16 months, Smart Charge HK every 9 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | b | Smart Charge HK |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| Update frequency | Every 16 months | Every 9 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 10.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 53 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | RHT INDUSTRIES LIMITED | Smart Charge (HK) Limited |
In-app purchases
b
No in-app purchases
Smart Charge HK
No in-app purchases
