# KL Serials vs Steer

The clearest difference is in-app purchases: KL Serials at none against Steer's 2. KL Serials also leads on iOS requirement (9.0 vs 26.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Steer sells 2 in-app purchases, starting at $9.99 per month. KL Serials asks for nothing beyond the download.

KL Serials ships an update every 3 months, Steer every 2 months. The most recent releases landed on October 8, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | KL Serials | Steer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/kl-serials/id1576480701/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free** | Freemium |
| Size | 29 MB | 26 MB |
| Requires iOS | **9.0** | 26.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hangzhou Junce Instruments Co., Ltd.](https://appshunter.io/developer/1535583983) | [Smarters Engineered](https://appshunter.io/developer/1821193944) |

## 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


### Steer

[App page](https://appshunter.io/ios/app/steer-obd2-car-scanner/id6461049378)

Transform your smartphone into a powerful OBD2 diagnostic tool. Read and clear fault codes, monitor real-time performance metrics, and test your vehicle's acceleration and emissions. Compatible with a wide range of car brands and OBD2 scanners.

**Highlights:** Universal OBD2 scanner compatibility, Read and erase fault codes, Real-time performance metrics, Acceleration and performance testing, Emission compliance checks, Supports various car brands

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OBD2 Pro | $9.99 | per month |
| OBD2 Pro | $19.99 | per year |


## Frequently asked questions

### Is KL Serials free?

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

### Is Steer free?

Steer is free to download, with in-app purchases available.

### Do KL Serials or Steer have ads?

Neither KL Serials nor Steer shows ads.

### Which is updated more often, KL Serials or Steer?

KL Serials ships an update every 3 months, and Steer every 2 months. Most recently, KL Serials was updated on October 8, 2026 and Steer on October 20, 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.*