# KL Serials vs Overkill Solar

The clearest difference is ratings volume: Overkill Solar at 16 against KL Serials's 2. KL Serials's advantage is iOS requirement (9.0 vs 13.4). On price, rating, update cadence and ads there is nothing between them.

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

Overkill Solar holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: Overkill Solar has 16 ratings behind it against 2, so its average is the more settled of the two.

KL Serials ships an update every 3 months, Overkill Solar every 4 months. The most recent releases landed on September 21, 2026 and August 18, 2026 respectively.

## The numbers

| Metric | KL Serials | Overkill Solar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/kl-serials/id1576480701/reviews) | **[4.7 (16 ratings)](https://appshunter.io/ios/app/overkill-solar/id6444233824/reviews)** |
| Number of ratings | 2 | **16** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free | Free |
| Size | 29 MB | 21 MB |
| Requires iOS | **9.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hangzhou Junce Instruments Co., Ltd.](https://appshunter.io/developer/1535583983) | [Overkill Solar LLC](https://appshunter.io/developer/1653276724) |

## 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


### Overkill Solar

[App page](https://appshunter.io/ios/app/overkill-solar/id6444233824)

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.

**Highlights:** 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

**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 Overkill Solar free?

Overkill Solar is free to download, with no in-app purchases.

### Which has better reviews, KL Serials or Overkill Solar?

Overkill Solar is rated higher. KL Serials averages 4.5 out of 5 from 2 ratings, while Overkill Solar averages 4.7 from 16 ratings.

### Do KL Serials or Overkill Solar have ads?

Neither KL Serials nor Overkill Solar shows ads.

### Which is updated more often, KL Serials or Overkill Solar?

KL Serials ships an update every 3 months, and Overkill Solar every 4 months. Most recently, KL Serials was updated on September 21, 2026 and Overkill Solar on August 18, 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.*