# KL Serials vs Solar App

The clearest difference is rating: KL Serials at 4.5 against Solar App's 3.1. KL Serials also leads on iOS requirement (9.0 vs 12.0). Solar App's advantage is update cadence (every 3 weeks vs every 3 months) and ratings volume (14 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 3.1. That said, the two scores are not equally well evidenced: Solar App has 14 ratings behind it against 2, so its average is the more settled of the two.

KL Serials ships an update every 3 months, Solar App every 3 weeks. The most recent releases landed on October 8, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | KL Serials | Solar App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/kl-serials/id1576480701/reviews)** | [3.1 (14 ratings)](https://appshunter.io/ios/app/solar-app/id6444056453/reviews) |
| Number of ratings | 2 | **14** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 29 MB | 90 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) | [疆 郭](https://appshunter.io/developer/1455940350) |

## 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


### Solar App

[App page](https://appshunter.io/ios/app/solar-app/id6444056453)

Connect and manage your solar energy system components, including controllers, inverters, and lithium batteries. Monitor your system's performance and ensure optimal energy generation.

**Highlights:** Connects solar controllers, Connects inverters, Connects lithium batteries, Device management, System monitoring

**In-app purchases:** none


## Frequently asked questions

### Is KL Serials free?

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

### Is Solar App free?

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

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

KL Serials is rated higher. KL Serials averages 4.5 out of 5 from 2 ratings, while Solar App averages 3.1 from 14 ratings.

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

Neither KL Serials nor Solar App shows ads.

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

KL Serials ships an update every 3 months, and Solar App every 3 weeks. Most recently, KL Serials was updated on October 8, 2026 and Solar App on October 4, 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.*