# KL Serials vs Balance BMS

The clearest difference is rating: KL Serials at 4.5 against Balance BMS's 4.0. KL Serials also leads on iOS requirement (9.0 vs 12.0). Balance BMS's advantage is update cadence (every 6 weeks vs every 3 months) and ratings volume (6 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

KL Serials holds the better App Store score, 4.5 against 4.0. Both are backed by a comparable volume of ratings — 2 and 6 respectively.

KL Serials ships an update every 3 months, Balance BMS every 6 weeks. The most recent releases landed on October 8, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | KL Serials | Balance BMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/kl-serials/id1576480701/reviews)** | [4.0 (6 ratings)](https://appshunter.io/ios/app/balance-bms/id6467124096/reviews) |
| Number of ratings | 2 | **6** |
| Positive reviews | — | 30.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 29 MB | 56 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Hangzhou Junce Instruments Co., Ltd.](https://appshunter.io/developer/1535583983) | [所兵 邱](https://appshunter.io/developer/1519230775) |

## What reviewers say

### KL Serials

[App page](https://appshunter.io/ios/app/kl-serials/id1576480701)

This utility app measures various electrical parameters like voltage, current, and power. It also offers multiple protection functions, including over-voltage, over-current, and over-temperature alerts, while monitoring battery capacity in real-time.

**Highlights:** Measures voltage, current, power, and capacity, Monitors watt-hours and time, Over-voltage protection, Over-current protection, Over-temperature protection, Real-time battery capacity monitoring, Automatic current direction identification

**Features:** macOS Compatibility

**In-app purchases:** none


### Balance BMS

[App page](https://appshunter.io/ios/app/balance-bms/id6467124096)

This app allows users to connect to and manage lithium batteries via Bluetooth. It provides detailed information about battery status, helps identify and manage individual battery strings, and allows for setting and reading safety parameters. Users can also monitor and be alerted to battery faults.

**Highlights:** Bluetooth battery connection, Battery status query, Identify abnormal batteries, Set battery protection parameters, Monitor battery fault alarms

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KL Serials free?

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

### Is Balance BMS free?

Balance BMS is free to download, with no in-app purchases.

### Which has better reviews, KL Serials or Balance BMS?

KL Serials is rated higher. KL Serials averages 4.5 out of 5 from 2 ratings, while Balance BMS averages 4.0 from 6 ratings.

### Do KL Serials or Balance BMS have ads?

Neither KL Serials nor Balance BMS shows ads.

### Which is updated more often, KL Serials or Balance BMS?

KL Serials ships an update every 3 months, and Balance BMS every 6 weeks. Most recently, KL Serials was updated on October 8, 2026 and Balance BMS on October 21, 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.*