BMS Tool vs PowerMon X
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BMS Tool
Monitor your battery management systems via Bluetooth. Supports multiple BMS types including Liontron, XiaoXiang, ANT, and Wattstunde. Offers a screen always-on mode and macOS compatibility.
- Screen Always ON mode
- Multiple BMS support
- Liontron BMS read-only
- XiaoXiang BMS read-only
- ANT BMS read-only
- Wattstunde LiFePo4 read-only
- macOS support
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BMS Tool shows the state of your battery from its battery management system (BMS) over Bluetooth, on the iPhone, the iPad, the Mac and the Apple Watch. Supported BMS: - XiaoXiang smart BMS - ANT BMS - Liontron batteries - Wattstunde LiFePO4 batteries Features: - Charge, voltage, current and power at a glance - Time until full while charging and until empty while discharging, estimated from the present current - Every cell voltage with minimum, maximum, difference and balancing - Temperature sensors, alarms and BMS information - Several batteries in one list, each with its own name - Session values and a CSV log of the readings - Home screen widget - Apple Watch app with complications: charge, cells, temperatures and alarms of the battery open on the iPhone - The display can stay on while the app is open The app reads the values of the BMS and does not change its settings. Ideas and requests are welcome at web.e77code.com/bms-tool.
PowerMon X
Monitor battery levels and performance of compatible devices via Bluetooth. View redesigned log data charts and access improved screens. Requires a physical PowerMon device.
- Redesigned log data charts
- Improved screens
- Compatibility with newest devices
- Compatibility with new firmware
- Bluetooth monitoring
- Requires physical device
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The PowerMon X app adds redesigned log data charts, improved screens, compatibility with the newest mobile devices and operating systems and compatibility with a new generation of devices and firmware versions. The application requires a physical PowerMon device which can be purchased from our store: www.thornwave.com. Please visit us online! If you'd like to test before you buy, click on this link after you install the app and it will connect you to a WiFi demo device located in our lab. https://applinks.thornwave.com/?n=DemoUnit&s=36129e86da98dda9&h=40&c=HzotUykUSvP/Ox0xdUpYVw%3D%3D&k=//////////////////////////////////////////8%3D
Screenshots
Verdict
The clearest difference is in-app purchases: PowerMon X at none against BMS Tool's 1. PowerMon X also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 2 months). On price, rating, review sentiment and ratings volume 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. BMS Tool sells 1 one-off in-app purchase. PowerMon X asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 3.9 for BMS Tool against 4.0 for PowerMon X. Both are backed by a comparable volume of ratings — 7 and 5 respectively. Written reviews are what separate them: 71% of BMS Tool's written reviews are positive against 67% of PowerMon X's.
BMS Tool ships an update every 2 months, PowerMon X every 3 weeks. The most recent releases landed on October 24, 2026 and September 29, 2026 respectively.
| Parameter | BMS Tool | PowerMon X |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (7 ratings) | 4.0 (5 ratings) — better |
| Positive reviews | 71.4% of reviews — better | 66.7% of reviews |
| Number of ratings | 7 — better | 5 |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 20 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | e77code GmbH | Thornwave Labs Inc |
Customer experience
BMS Tool
PowerMon X
In-app purchases
BMS Tool
- Remove Ads$1.99
PowerMon X
No in-app purchases
