# SDPROG vs OBD2 Expert

The clearest difference is rating: SDPROG at 5.0 against OBD2 Expert's 4.1. SDPROG also leads on in-app purchases (none vs 4) and update cadence (every 9 days vs every 2 months). OBD2 Expert's advantage is ratings volume (725 vs 2) and iOS requirement (9.3 vs 14.0). On price, ads and device support there is nothing between them.

Both are free to download. OBD2 Expert sells 4 one-off in-app purchases. SDPROG asks for nothing beyond the download.

SDPROG holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: OBD2 Expert has 725 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 25% of SDPROG's written reviews are positive against 8% of OBD2 Expert's.

SDPROG ships an update every 9 days, OBD2 Expert every 2 months. The most recent releases landed on September 14, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | SDPROG | OBD2 Expert |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sdprog/id1020589879/reviews)** | [4.1 (725 ratings)](https://appshunter.io/ios/app/obd2-expert/id1142156521/reviews) |
| Number of ratings | 2 | **725** |
| Positive reviews | **25.0% of reviews** | 8.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 85 MB | 17 MB |
| Requires iOS | 14.0 | **9.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NexDiag Sp z o. o.](https://appshunter.io/developer/1316943345) | [Michael Lauer](https://appshunter.io/developer/300205595) |

## What reviewers say

### SDPROG

[App page](https://appshunter.io/ios/app/sdprog/id1020589879)

This advanced diagnostic tool allows for comprehensive vehicle system analysis, including emission filters and real-time parameter monitoring. It supports cars, motorcycles, ATVs, hybrids, and electric vehicles, offering detailed insights into engine and onboard modules.

**Highlights:** Comprehensive OBD2 and service diagnostics, Advanced emission filter analysis (DPF, FAP, GPF, PEF), Real-time vehicle parameter monitoring, DTC reading and clearing, Support for cars, motorcycles, ATVs, hybrids, and EVs

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

**In-app purchases:** none


### OBD2 Expert

[App page](https://appshunter.io/ios/app/obd2-expert/id1142156521)

Diagnose and monitor your vehicle's health by connecting an OBD2 adapter. View sensor data, read and reset trouble codes, and analyze diagnostic information. Developers can use it as a hardware simulator or protocol bridge.

**Highlights:** Vehicle diagnostics and monitoring, Read and reset diagnostic trouble codes (DTC), View current sensor data, Analyze Mode 6 diagnostics, Load vehicle status files for testing, Share vehicle status data, BLE/WiFi OBD2 ScanTool simulator for developers, OBD2 protocol communication bridge

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Operation Mode Bridge | $0.99 | one-time |
| Operation Mode ScanTool | $2.99 | one-time |
| Operation Mode Simulator | $4.99 | one-time |
| All Features | $5.99 | one-time |

**What reviewers like**

- 👍 Works well
- 🚀 Fast and responsive
- 💡 Useful features

**What reviewers complain about**

- 🐛 Crashes frequently
- 🔒 Requires payment to unlock core functionality
- ⚠️ Doesn't detect/connect to OBD2 adapter
- 🤖 Lacks instructions/documentation
- 💸 Overpriced for limited functionality

**Reported bugs**

- Freezes during use
- Fails to recognize compatible OBD2 adapters
- Inaccurate vehicle information detection

**Requested features**

- Add support for more vehicle models
- Implement live data monitoring
- Include ability to clear diagnostic codes
- Provide free trial period to test functionality


## Frequently asked questions

### Is SDPROG free?

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

### Is OBD2 Expert free?

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

### Which has better reviews, SDPROG or OBD2 Expert?

SDPROG is rated higher. SDPROG averages 5.0 out of 5 from 2 ratings, while OBD2 Expert averages 4.1 from 725 ratings.

### Do SDPROG or OBD2 Expert have ads?

Neither SDPROG nor OBD2 Expert shows ads.

### Which is updated more often, SDPROG or OBD2 Expert?

SDPROG ships an update every 9 days, and OBD2 Expert every 2 months. Most recently, SDPROG was updated on September 14, 2026 and OBD2 Expert on September 24, 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.*