# 123SmartBMS vs KG Serials

The clearest difference is review sentiment: 123SmartBMS at 67% against KG Serials's 0%. 123SmartBMS also leads on rating (4.5 vs 3.4) and ratings volume (21 vs 7). KG Serials's advantage is iOS requirement (9.0 vs 16.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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 3.4. Both are backed by a comparable volume of ratings — 21 and 7 respectively. Written reviews point the same way: 67% of 123SmartBMS's written reviews are positive against 0% of KG Serials's.

Both ship on a similar rhythm, roughly monthly. Both last shipped on October 7, 2026.

## The numbers

| Metric | 123SmartBMS | KG Serials |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (21 ratings)](https://appshunter.io/ios/app/123smartbms/id988285264/reviews)** | [3.4 (7 ratings)](https://appshunter.io/ios/app/kg-serials/id1556594835/reviews) |
| Number of ratings | **21** | 7 |
| Positive reviews | **66.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free | Free |
| Size | 190 MB | 30 MB |
| Requires iOS | 16.0 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Albertronic B.V.](https://appshunter.io/developer/890882604) | [Hangzhou Junce Instruments Co., Ltd.](https://appshunter.io/developer/1535583983) |

## What reviewers say

### 123SmartBMS

[App page](https://appshunter.io/ios/app/123smartbms/id988285264)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### KG Serials

[App page](https://appshunter.io/ios/app/kg-serials/id1556594835)

This utility measures electrical parameters like voltage, current, and power. It offers multiple protection functions and real-time battery monitoring on a color LCD. The app also supports data export and remote control via mobile or PC.

**Highlights:** Measures voltage, current, power, capacity, Multiple protection functions (over/under voltage, over current), Real-time battery monitoring, Color LCD display, Voltage and current curve display, Mobile app and PC control, Firmware updates

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 123SmartBMS free?

123SmartBMS is free to download, with no in-app purchases.

### Is KG Serials free?

KG Serials is free to download, with no in-app purchases.

### Which has better reviews, 123SmartBMS or KG Serials?

123SmartBMS is rated higher. 123SmartBMS averages 4.5 out of 5 from 21 ratings, while KG Serials averages 3.4 from 7 ratings.

### Do 123SmartBMS or KG Serials have ads?

Neither 123SmartBMS nor KG Serials shows ads.

### Which is updated more often, 123SmartBMS or KG Serials?

123SmartBMS ships an update monthly, and KG Serials monthly. Most recently, 123SmartBMS was updated on October 7, 2026 and KG Serials on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*