# Engine Link vs LL2Link

The clearest difference is price: LL2Link at Free against Engine Link's $5.99. Engine Link's advantage is ratings volume (62 vs 2). On rating, update cadence, ads and in-app purchases there is nothing between them.

LL2Link is free to download; Engine Link costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 2.9 for Engine Link against 3.0 for LL2Link. That said, the two scores are not equally well evidenced: Engine Link has 62 ratings behind it against 2, so its average is the more settled of the two.

Engine Link ships an update every 2 months, LL2Link every 3 months. The most recent releases landed on November 1, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Engine Link | LL2Link |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | [2.9 (62 ratings)](https://appshunter.io/ios/app/engine-link-obd-ii-diagnosis/id591557194/reviews) | **[3.0 (2 ratings)](https://appshunter.io/ios/app/ll2link/id1469519145/reviews)** |
| Number of ratings | **62** | 2 |
| Positive reviews | 38.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free | Free |
| Size | 10 MB | 27 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [K SOLUTION LLC](https://appshunter.io/developer/289670447) | [Cheng Hsin Yao](https://appshunter.io/developer/1469519144) |

## What reviewers say

### Engine Link

[App page](https://appshunter.io/ios/app/engine-link-obd-ii-diagnosis/id591557194)

Transform your iPhone into a powerful vehicle diagnostics tool. Monitor real-time performance, read and clear fault codes, and customize your dashboard with detailed sensor data. Supports emission testing and offers a HUD mode for night driving.

**Highlights:** Real-time vehicle monitoring, Read and clear OBD fault codes, Customizable gauges and dashboards, MPG widget and fuel efficiency plotting, Heads up display (HUD) mode, Horsepower, torque, and acceleration metrics, Custom PID support

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Works as expected
- 👍 Flexible and customizable
- 💡 Supports custom PIDs
- 🚀 Reliable connection
- 👍 Good customer support

**What reviewers complain about**

- 🐛 Doesn't work with all OBD dongles
- 🐛 Compatibility issues with newer iOS versions
- 👎 Outdated and clunky interface
- 👎 Limited functionality for EVs
- 🐛 Connectivity problems

**Reported bugs**

- App crashes on connection
- Fails to read/clear error codes
- Inaccurate sensor readings
- Compatibility issues with certain OBD dongles

**Requested features**

- Add support for more vehicle types
- Improve user interface and customization options
- Add more PID support, especially for EVs
- Implement language localization
- Improve data logging and export capabilities


### LL2Link

[App page](https://appshunter.io/ios/app/ll2link/id1469519145)

Record and manage vehicle information and attitude, including speed and cornering G-force. Integrate video recording with driving data for synchronized playback and sharing. Analyze driving performance and compare trips via cloud storage.

**Highlights:** Record vehicle information and attitude, Integrate video recording with driving data, Synchronized playback of video and data, Upload to social and video streaming platforms, Cloud storage for driving analysis, Supports cars, motorcycles, and scooters

**In-app purchases:** none


## Frequently asked questions

### Is Engine Link free?

Engine Link costs $5.99, with no in-app purchases.

### Is LL2Link free?

LL2Link is free to download, with no in-app purchases.

### Which has better reviews, Engine Link or LL2Link?

LL2Link is rated higher. Engine Link averages 2.9 out of 5 from 62 ratings, while LL2Link averages 3.0 from 2 ratings.

### Do Engine Link or LL2Link have ads?

Neither Engine Link nor LL2Link shows ads.

### Which is updated more often, Engine Link or LL2Link?

Engine Link ships an update every 2 months, and LL2Link every 3 months. Most recently, Engine Link was updated on November 1, 2026 and LL2Link on October 22, 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.*