# Smart USB Power Meter > USB power meter and data logger for GardCharge GC101 devices. (iPhone/iPad app by Joybien Technologies Co., Ltd..) - Source: https://appshunter.io/ios/app/smart-usb-power-meter/id1342475252 (this page in markdown: same URL + `.md`) - Developer: [Joybien Technologies Co., Ltd.](https://appshunter.io/developer/942916760) - Category: Education, Utilities - Price: $1.99 - Rating: 1.00/5 from 5 App Store ratings · 3 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 33 MB - Languages: English, Chinese, Chinese - Released: 2018-03-10 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/smart-usb-power-meter/id1342475252/reviews.md ## What is Smart USB Power Meter? This App works with GardCharge GC101 Smart USB Timer Charger Protector. This App will enable GardCharge to become a Smart USB Power Meter with data logging / data acquisition capability; for measuring USB Power with 3.6V~21V and 0A~3.5A range; and with either Real Time Meter or Real Time Scalable Graph Display Mode ( for info such as Voltage, Current, Watt, Capacity, etc.). Moreover, the App will allow you to perform data logging with RECORD Mode, along with GardCharge Internal Memory Data acquisition; while you may also export the logged data to send out via e-mail. ## Key features - Real-time power meter - Scalable graph display - Data logging and recording - Export logged data via email - Track voltage, current, wattage, capacity - Compatible with GardCharge GC101 ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/smart-usb-power-meter/id1342475252/reviews.md ### 1/5 — -1 star *2023-08-01* Garbage, doesn’t work. I want my money back as well! ### 1/5 — I want a refund *2022-07-07* This app is junk! It does not work! I want my money back! ### 1/5 — It is not working *2018-11-27* It’s just crazy is not working ## Frequently asked questions about Smart USB Power Meter ### What is Smart USB Power Meter used for? Smart USB Power Meter works with the GardCharge GC101 to measure USB power, display real-time data like voltage and current, and log consumption over time. It allows you to export this data for analysis. ### Does Smart USB Power Meter require specific hardware? Yes, this app requires the GardCharge GC101 Smart USB Timer Charger Protector to function as a power meter and data logger. ### What kind of data can Smart USB Power Meter track? The app can track voltage (3.6V~21V), current (0A~3.5A), wattage, and capacity. It presents this information in real-time meter or graph display modes. ### Can I save the power usage data from Smart USB Power Meter? Yes, the app has a RECORD Mode for data logging and can acquire data from the GardCharge's internal memory. You can then export this logged data via email. ### What devices is Smart USB Power Meter compatible with? Smart USB Power Meter is designed for use on iPhone, iPad, iPod, and Apple Watch devices. ### How much does Smart USB Power Meter cost? Smart USB Power Meter is a paid application, priced at $1.99. It does not feature in-app purchases or advertisements. ### When was Smart USB Power Meter last updated? The latest version of Smart USB Power Meter was released on January 11, 2019. The app was initially released on March 10, 2018. ### What is the user rating for Smart USB Power Meter? Smart USB Power Meter has a rating of 1.0 stars based on 5 user ratings. The app is rated for ages 4 and up. ## Version history (last 4 releases) ### 1.0.4 — 2019-01-11 Watch Complication ### 1.0.3 — 2018-12-28 Add Apple Watch App ### 1.0.1 — 2018-03-20 1.Bug fix 2. 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User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*