BMS Tool vs Overkill Solar
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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Universal BMS (Battery Management) monitoring app. Actual functionality: - Screen Always ON mode - Multiple BMS View / support - Read only support for Liontron BMS - Read only support for XiaoXiang BMS - Read only support for ANT BMS - Read only support for Wattstunde LiFePo4 batteries - Support for macOS Functionality Requests please submit on GitHub.
Overkill Solar
This app connects to a solar battery management system to provide detailed monitoring and control. Users can track cell voltage, capacity, current, and manage charging/discharging ports. It also offers advanced configuration options for calibration, balancing, and protection settings.
- Monitor cell voltage and capacity
- Control charging and discharging ports
- Calibrate voltage and current
- Configure balancer and protection values
- Log voltage, current, and power
- Monitor BMS alarms and temperature
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Overkill Solar iOS App allows users to connect with the Overkill Solar Battery Management System (BMS). It can monitor voltage of the cells, total capacity, charging and discharging current, and switch the charging and discharging ports on or off. Features: - change bluetooth advertising name - unlock hardware protected BMS - save or load BMS configurations - calibrate cells voltage and charging or discharging current - log maximum or minimum voltage, current and power - enable and configure the balancer - modify the capacity settings - monitor temperature - monitor BMS alarms - import and export .fig files - set level 2 and 3 advanced protection values
Screenshots
Verdict
The clearest difference is rating: Overkill Solar at 4.7 against BMS Tool's 3.9. Overkill Solar also leads on in-app purchases (none vs 1) and ads (none vs shown). BMS Tool's advantage is update cadence (every 2 months vs every 4 months). On price, ratings volume 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. BMS Tool sells 1 one-off in-app purchase. Overkill Solar asks for nothing beyond the download.
Overkill Solar holds the better App Store score, 4.7 against 3.9. Both are backed by a comparable volume of ratings — 7 and 16 respectively. Written reviews point the same way: 71% of BMS Tool's written reviews are positive against 100% of Overkill Solar's.
BMS Tool ships an update every 2 months, Overkill Solar every 4 months. The most recent releases landed on September 16, 2026 and August 18, 2026 respectively.
| Parameter | BMS Tool | Overkill Solar |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (7 ratings) | 4.7 (16 ratings) — better |
| Positive reviews | 71.4% of reviews | 100.0% of reviews — better |
| Number of ratings | 7 | 16 — better |
| Update frequency | Every 2 months — better | Every 4 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.2 | 13.4 — better |
| Further details — not scored | ||
| Size | 9 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | e77code GmbH | Overkill Solar LLC |
Customer experience
BMS Tool
Overkill Solar
In-app purchases
BMS Tool
- Remove Ads$1.99
Overkill Solar
No in-app purchases
