123SmartBMS vs Sun Fun Kits BMS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
123SmartBMS
This app monitors and manages lithium battery packs, ensuring optimal condition and extended lifespan. It tracks cell voltages, temperatures, and currents, while balancing cells during charging. Connect via Bluetooth to view real-time battery status and control charging/discharging.
- Monitors cell voltages and temperatures
- Tracks in- and outgoing currents
- Balances cells during charging
- Bluetooth connectivity for real-time data
- Controls charge/discharge signals
- Extends battery pack lifespan
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123\SmartBMS is an easy to use yet advanced, modular BMS to keep your lithium batteries in perfect condition, increasing the lifespan of the battery pack. The system measures important data like cell voltages, cell temperatures and in- and outgoing currents. It also balances all cells to the same voltage during charging. The BMS supervises the whole battery pack and has two signal relays to indicate “allow to charge” and “allow to discharge”. These signal relays can control chargers and inverters with “enable”/”disable” signals or by connecting an energy efficient power relay to the signal relay. An example is the 123\SmartRelay. Easily connect your phone to the BMS using Bluetooth to see relevant information including state of charge, energy consumed, energy stored, in- and outgoing current, cell voltages and temperatures. With 123\SmartBMS, your battery pack is in safe hands.
Sun Fun Kits BMS
Manage your smart batteries and kits effortlessly. View battery health, state of charge, and perform diagnostics. Supports all Sun Fun Kits products and devices using the BLE protocol.
- Manage smart batteries and kits
- View battery health
- Check state of charge
- Perform battery diagnostics
- Supports BLE protocol devices
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With the Sun Fun Kits BMS app, you can manage your smart batteries and kits with ease; it's completely free! Supports all Sun Fun Kits products & devices. You can view your battery health and state of charge as well as perform diagnostics on your battery. Supports the SFK-260, SFK-260HP, KIT BMS, and future products that use the BLE protocol. NOTE: BLE devices require location services, please ensure these are turned on.
Screenshots
Verdict
The clearest difference is rating: 123SmartBMS at 4.5 against Sun Fun Kits BMS's 2.8. 123SmartBMS also leads on review sentiment (67% vs 25%). Sun Fun Kits BMS's advantage is update cadence (every 4 days vs monthly). On price, ratings volume, ads and in-app purchases 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.
123SmartBMS holds the better App Store score, 4.5 against 2.8. Both are backed by a comparable volume of ratings — 21 and 11 respectively. Written reviews point the same way: 67% of 123SmartBMS's written reviews are positive against 25% of Sun Fun Kits BMS's.
123SmartBMS ships an update monthly, Sun Fun Kits BMS every 4 days. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.
| Parameter | 123SmartBMS | Sun Fun Kits BMS |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (21 ratings) — better | 2.8 (11 ratings) |
| Positive reviews | 66.7% of reviews — better | 25.0% of reviews |
| Number of ratings | 21 — better | 11 |
| Update frequency | Monthly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 190 MB | 193 MB |
| Age rating | 4+ | 4+ |
| Developer | Albertronic B.V. | sunfunkits |
Customer experience
123SmartBMS
Sun Fun Kits BMS
In-app purchases
123SmartBMS
No in-app purchases
Sun Fun Kits BMS
No in-app purchases
