B vs iEMS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
B
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B-iSolar京东方光伏电站营维系统是为了解决多地多电站的集中运维问题而建设的一款集电站信息化、智能化、无人化为一体的营维系统
iEMS
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Intelligent Energy Management System (iEMS) - Focusing on the new energy fields of photovoltaic and energy storage, it takes efficient and stable monitoring and operation maintenance as the core. By virtue of real-time data analysis and fault prediction, it improves energy output and reduces costs. It provides customized solutions to adapt to multiple scenarios, and helps promote the sustainable prosperity and development of the green energy industry.
Screenshots
Verdict
The clearest difference is update cadence: B at every 3 weeks against iEMS's every 4 months. iEMS's advantage is iOS requirement (13.0 vs 15.6). 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.
B ships an update every 3 weeks, iEMS every 4 months. The most recent releases landed on September 18, 2026 and September 16, 2026 respectively.
| Parameter | B | iEMS |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 44 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | BOE Energy Technology Co., Ltd. | Shenzhen ZTE Software Co., Ltd. |
In-app purchases
B
No in-app purchases
iEMS
No in-app purchases
