Roamer BMS vs Powerful BMS
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Roamer BMS
Monitor your LiFePO4 batteries wirelessly from your iPhone. View real-time state of charge, voltage, current, and internal cell voltages. Compatible only with second-generation Roamer Batteries Smart BMS.
- Wireless Bluetooth connection
- Real-time battery monitoring
- State of charge display
- Voltage and current readings
- Internal cell voltage display
- BMS parameter adjustment (admin)
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The Roamer BMS app allows you to monitor LiFePO4 batteries equipped with the new Roamer Batteries Smart BMS. Please note, this app is only suitable for second-generation Roamer Batteries. Other brands or first-generation models are not compatible. FEATURES No need for a separate battery monitor Wirelessly connect to your battery from your iPhone Monitor your battery state of charge, voltage and current in real time Displays internal battery status including cell voltages Change BMS parameters using admin password (request from Roamer) PLEASE NOTE The iPhone requires Bluetooth 5.0 with BLE functions You must accept all security permissions when requested or the app will not work Operating distance should be less than 10m The app will only connect with one battery at a time If you want to connect with another iPhone, please shutdown the app on the first iPhone The password for the Details page is in the user guide which can be downloaded from www.roamerbatteries.com/support/quick-start The password for the parameters page can be requested from Roamer. This is an admin only page, changing parameters without permission from Roamer can invalidate your battery warranty. ย Offered by Roamer Batteries Ltd
Powerful BMS
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Real-time battery status monitoring The on-board equipment can accurately detect the voltage, SOC and SOH status of the battery when it is stationary by dynamically detecting the status of the vehicle. 4G data transmission The battery test results are regularly transmitted to end users and service providers through 4G, so as to understand the real-time status of the battery and monitor the battery usage trend to avoid any loss caused by sudden battery damage. Customized early warning/digital drainage Battery feed or deterioration warning can be customized according to requirements, and timely remind end users to collect effective measures. OEMs and their dealership stores can also use early warning information to remind end users to return to the store for battery testing and maintenance in a timely manner.
Screenshots
Verdict
The clearest difference is update cadence: Roamer BMS at every 2 weeks against Powerful BMS's every 2 months. Roamer BMS also leads on iOS requirement (11.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Roamer BMS ships an update every 2 weeks, Powerful BMS every 2 months. The most recent releases landed on October 15, 2026 and October 13, 2026 respectively.
| Parameter | Roamer BMS | Powerful BMS |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 16.7% of reviews | โ |
| Update frequency | Every 2 weeks โ better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | โ |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 11.0 โ better | 15.6 |
| Further details โ not scored | ||
| Size | 5 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | ๆญฅๆณฝ ็ | Shenzhen Leagend Optoelectronics Co., Ltd. |
In-app purchases
Roamer BMS
No in-app purchases
Powerful BMS
No in-app purchases







