PowerMaster vs GGI
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
PowerMaster
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Monitor your UPS and get prompt notification anywhere and anytime! PowerMaster app provides a status overview of your UPS. It enables you to monitor your UPS and supports event notifications to ensure instant event update. PowerMaster app also supports multiple UPS monitoring. You can select a UPS from the UPS List and check its status. Download free PowerMaster app and enjoy the benefits the following features bring: - Monitor Monitor page provides an overview of the UPS current status, including power supplied, voltage supplied, power condition, battery capacity, battery status, estimated runtime and UPS load. Multiple UPS monitoring is also available. - Event log Event log info provides the a list of happened events.
GGI
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GGI-ESS is a professional, cloud-based Energy Management System (EMS) designed specifically for Battery Energy Storage Systems (BESS) in commercial and industrial (C&I) applications. The app provides real-time monitoring, operational visibility, and system-level diagnostics to support safe, stable, and efficient operation of BESS assets. With secure cloud connectivity, GGI-ESS enables operators, engineers, and asset owners to remotely monitor system performance, review historical data, and respond quickly to operational events. Key Features ⢠Real-time monitoring of BESS components & parameters, including PCS, BMS, SOC, SOH, power flow, and system status ⢠Cloud-based dashboards with secure remote access ⢠Alarm notifications, event logs, and fault diagnostics ⢠Historical data analysis and performance trend tracking ⢠Centralized monitoring for single-site or multi-site BESS deployments ⢠Scalable architecture for commercial and industrial energy storage systems Designed for Commercial & Industrial BESS ⢠Clear visibility into BESS operating status and performance ⢠Faster troubleshooting through alarms, logs, and system data ⢠Improved operational efficiency and reduced downtime ⢠Support for long-term system operation and asset management Why GGI-ESS GGI-ESS simplifies the operation of commercial and industrial BESS by turning complex system data into clear, actionable insights. Built for professional energy storage operations, GGI-ESS helps ensure system reliability, operational transparency, and long-term asset value.
Screenshots
Verdict
The clearest difference is update cadence: GGI at every 11 days against PowerMaster's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
PowerMaster ships an update every 4 months, GGI every 11 days. The most recent releases landed on October 11, 2026 and October 19, 2026 respectively.
| Parameter | PowerMaster | GGI |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Every 11 days ā better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.0 ā better | 13.0 |
| Further details ā not scored | ||
| Size | 52 MB | 38 MB |
| Age rating | 17+ | 4+ |
| Developer | Cyber Energy Co., Ltd. | Hoang Dang |
In-app purchases
PowerMaster
No in-app purchases
GGI
No in-app purchases









