BM6 vs Solar Guardian
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BM6
Monitor your car's battery in real-time via Bluetooth. This app tests starting and charging systems, records engine start/stop times, and displays all data on your mobile device for easy management of your vehicle's battery power.
- Real-time battery voltage monitoring
- Starting system voltage test
- Charging system voltage test
- Records engine start/stop times
- Bluetooth data display
- Vehicle battery power management
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Battery monitor 6 is an application of automobile battery. It can let people know the voltage of automobile battery in real time. It helps users fully understand the battery by testing the starting and charging system voltage. It can accurately record the time of car starting and stopping. All data can be displayed on the mobile phone through Bluetooth. Easy management of vehicle battery power
Solar Guardian
Monitor and configure various solar energy systems, including inverters and storage solutions. This utility app provides essential data display and parameter adjustments for efficient energy management.
- Data display for solar systems
- Parameter setting for inverters
- Supports grid-tie and hybrid inverters
- Manages energy storage systems
- Configures N+1 hybrid systems
- Monitors home and mobile energy storage
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Solar Guardian is a new application with the core function of data display and parameter setting for inverters, solar chargers, grid-tie inverters, hybrid inverters, energy storage systems, N+1 hybrid systems, home energy storage and mobile energy storage.
Screenshots
Verdict
The clearest difference is rating: BM6 at 3.3 against Solar Guardian's 2.3. BM6 also leads on review sentiment (46% vs 17%). Solar Guardian's advantage is iOS requirement (13.0 vs 15.6). On price, ratings volume, update cadence and ads 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. Neither carries in-app purchases, so what you see is what you pay.
BM6 holds the better App Store score, 3.3 against 2.3. Both are backed by a comparable volume of ratings — 18 and 17 respectively. Written reviews point the same way: 46% of BM6's written reviews are positive against 17% of Solar Guardian's.
BM6 ships an update every 5 weeks, Solar Guardian every 2 months. Both last shipped on November 3, 2026.
| Parameter | BM6 | Solar Guardian |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (18 ratings) — better | 2.3 (17 ratings) |
| Positive reviews | 45.8% of reviews — better | 16.7% of reviews |
| Number of ratings | 18 — better | 17 |
| Update frequency | Every 5 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod, Apple Watch — better | iPhone, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 64 MB | 85 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Leagend Optoelectronics Co., Ltd. | BEIJING EPSOLAR TECHNOLOGY CO., LTD. |
Customer experience
BM6
Solar Guardian
In-app purchases
BM6
No in-app purchases
Solar Guardian
No in-app purchases
