# ZDOBD vs OBD2 Scanner

The clearest difference is rating: OBD2 Scanner at 4.6 against ZDOBD's 2.0. OBD2 Scanner also leads on ratings volume (1.1K vs 4) and review sentiment (23% vs 0%). ZDOBD's advantage is in-app purchases (none vs 6) and ads (none vs shown). On price, update cadence, monetization model and device support there is nothing between them.

Both are free to download. OBD2 Scanner sells 6 in-app purchases, starting at $6.99 per 7 days. ZDOBD asks for nothing beyond the download.

OBD2 Scanner holds the better App Store score, 4.6 against 2.0. That said, the two scores are not equally well evidenced: OBD2 Scanner has 1.1K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 0% of ZDOBD's written reviews are positive against 23% of OBD2 Scanner's.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | ZDOBD | OBD2 Scanner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (4 ratings)](https://appshunter.io/ios/app/zdobd/id6449920963/reviews) | **[4.6 (1.1K ratings)](https://appshunter.io/ios/app/obd2-scanner-torque-elm-327/id6477899127/reviews)** |
| Number of ratings | 4 | **1.1K** |
| Positive reviews | 0.0% of reviews | **22.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 22 MB | 102 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [深圳市正德友邦科技有限公司](https://appshunter.io/developer/1691030696) | [Phong Pham](https://appshunter.io/developer/1731047500) |

## What reviewers say

### 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


### OBD2 Scanner

[App page](https://appshunter.io/ios/app/obd2-scanner-torque-elm-327/id6477899127)

Transform your smartphone into a powerful car diagnostic tool. Monitor real-time engine data, read and clear trouble codes, and track your vehicle's performance. Customize your dashboard and access repair manuals to understand and fix issues.

**Highlights:** Real-time engine data monitoring, Read and clear trouble codes, Performance tracking, Customizable dashboards, Repair manual database, Compatibility with OBD2 ELM327 adapters

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium weeky freetrial | $6.99 | per 7 days |
| Premium Weekly | $7.99 | per 7 days |
| Premium Monthly | $14.99 | per month |
| Premium Monthly | $17.99 | per month |
| Premium Yearly | $59.99 | per year |
| Lifetime Premium | $69.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use setup
- ✅ Works well for some vehicle models
- ⭐ Useful for basic OBD2 scanning

**What reviewers complain about**

- 💰 Expensive pricing for limited functionality
- 🐛 Bluetooth connection drops frequently
- ❌ Poor compatibility with many vehicle models
- 📱 Deceptive UI with hidden exit menus
- 🔒 Security concerns and unauthorized charges

**Reported bugs**

- Bluetooth connection drops and requires reboot
- App fails to connect to OBD2 devices
- Sensors display N/A values in paid version
- Cannot select vehicle profile
- App crashes or becomes unresponsive

**Requested features**

- Oil temperature and transmission data
- Wheel sensor information
- Pending DTC display
- Permanent check engine light clearing
- Module-specific scanning selection


## Frequently asked questions

### Is ZDOBD free?

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

### Is OBD2 Scanner free?

OBD2 Scanner is free to download, with in-app purchases available.

### Which has better reviews, ZDOBD or OBD2 Scanner?

OBD2 Scanner is rated higher. ZDOBD averages 2.0 out of 5 from 4 ratings, while OBD2 Scanner averages 4.6 from 1.1K ratings.

### Do ZDOBD or OBD2 Scanner have ads?

OBD2 Scanner shows ads; ZDOBD does not.

### Which is updated more often, ZDOBD or OBD2 Scanner?

ZDOBD ships an update monthly, and OBD2 Scanner monthly. Most recently, ZDOBD was updated on November 3, 2026 and OBD2 Scanner on November 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.*