# OBD JScan vs ZDOBD

The clearest difference is review sentiment: OBD JScan at 79% against ZDOBD's 0%. OBD JScan also leads on rating (4.7 vs 2.0) and ratings volume (1.3K vs 4). ZDOBD's advantage is in-app purchases (none vs 8). On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. OBD JScan sells 7 one-off in-app purchases. ZDOBD asks for nothing beyond the download.

OBD JScan holds the better App Store score, 4.7 against 2.0. That said, the two scores are not equally well evidenced: OBD JScan has 1.3K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 79% of OBD JScan's written reviews are positive against 0% of ZDOBD's.

OBD JScan ships an update every 3 weeks, ZDOBD monthly. The most recent releases landed on September 25, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | OBD JScan | ZDOBD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.3K ratings)](https://appshunter.io/ios/app/obd-jscan/id1445903514/reviews)** | [2.0 (4 ratings)](https://appshunter.io/ios/app/zdobd/id6449920963/reviews) |
| Number of ratings | **1.3K** | 4 |
| Positive reviews | **79.5% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 403 MB | 22 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Piotr Bialic](https://appshunter.io/developer/960266498) | [深圳市正德友邦科技有限公司](https://appshunter.io/developer/1691030696) |

## What reviewers say

### OBD JScan

[App page](https://appshunter.io/ios/app/obd-jscan/id1445903514)

This app provides advanced diagnostics for Jeep, Chrysler, and Dodge vehicles. It allows users to read and clear trouble codes, view live sensor data, and access settings across all vehicle modules, including ABS and transmission.

**Highlights:** Read/Clear Diagnostic Trouble Codes, Access Live Data from all sensors, View vehicle settings, Access all vehicle modules (ABS, Transmission, etc.), Identify module, VIN, Part Number, and Version, Share vehicle trouble codes

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| + 1 garage license | $9.99 | one-time |
| 1 VIN license | $20.99 | one-time |
| Add 1 VIN | $20.99 | one-time |
| Add 1 VIN Vehicle Slot | $20.99 | one-time |
| 3 VIN licenses | $54.99 | one-time |
| 5 VIN Licenses | $84.99 | one-time |
| 10 VIN Licenses | $149.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 🔧 Powerful customization options
- 👍 Excellent customer support
- 💡 Useful diagnostic and monitoring features
- 🔓 Enables features otherwise locked by dealer

**What reviewers complain about**

- 🐛 Occasional connectivity issues
- 🔌 Requires additional hardware purchase
- ⚠️ Compatibility issues with newer vehicle models
- 🕰️ Slow performance in certain scenarios

**Reported bugs**

- Inability to save/export diagnostic data
- Inconsistent behavior when changing vehicle settings

**Requested features**

- Expanded vehicle compatibility
- Improved stability and reliability
- Enhanced user interface and guidance
- Integration with other vehicle apps/services


### ZDOBD

[App page](https://appshunter.io/ios/app/zdobd/id6449920963)

This diagnostic tool connects to portable diesel vehicle devices via Bluetooth to perform comprehensive vehicle checks. It allows users to view ECU information, diagnose and clear faults, monitor real-time data, and conduct specific tests like DPF regeneration.

**Highlights:** Bluetooth connectivity, ECU version information, Vehicle fault diagnosis and clearing, Real-time data flow monitoring, DPF regeneration, SCR testing

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OBD JScan free?

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

### Is ZDOBD free?

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

### Which has better reviews, OBD JScan or ZDOBD?

OBD JScan is rated higher. OBD JScan averages 4.7 out of 5 from 1.3K ratings, while ZDOBD averages 2.0 from 4 ratings.

### Do OBD JScan or ZDOBD have ads?

Neither OBD JScan nor ZDOBD shows ads.

### Which is updated more often, OBD JScan or ZDOBD?

OBD JScan ships an update every 3 weeks, and ZDOBD monthly. Most recently, OBD JScan was updated on September 25, 2026 and ZDOBD on September 8, 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.*