iOBD2 vs OBD Quest
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iOBD2
This app serves as a reference for standard Diagnostic Trouble Codes (DTCs) found in vehicles. It helps users understand fault codes generated by a car's onboard computer, aiding in problem diagnosis.
- Diagnostic Trouble Code reference
- Fault code lookup
- Vehicle system diagnostics
- Problem identification
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Standard Diagnostic Trouble Codes reference book. A Diagnostic Trouble Code is set in a vehicle's on-board computer when a fault occurs in any monitored system. The code number corresponds to the type of fault, and can be used to diagnose the problem.
OBD Quest
Decode and understand car diagnostic trouble codes with this comprehensive interpreter. It provides detailed insights into fault codes, potential causes, and repair recommendations, complementing your existing OBD2 scanning tools. Access a vast database of codes across multiple languages and car brands to diagnose issues with confidence.
- Interpretation of over 85,000 OBD2 codes
- Multilingual support (English, French, Italian, German, Portuguese, Spanish)
- Extensive coverage across auto makes and brands
- Detailed insights for each code search
- Unlimited code searches
- AI-powered code interpretation
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Unlock the ultimate power of OBD2 code interpretation with OBDQuest, your comprehensive solution for decoding, understanding and diagnosing car issues. Whether you're looking up a specific DTC fault code definition, or utilizing an OBD2 car scanner, OBDQuest will be your work companion you ever needed to provide unmatched insights into each individual fault code. Don’t get confused, this simple yet innovative application exploiting the power of AI along with comprehensive OBDii SAE/ISO databases is complementing your daily scanning tools below: obd2 scanner, torque obd2, bluedriver obd2 scan tool, car scanner, car scanner elm obd2, carista, obd fusion, forscan, obdlink, obd11, obdeleven, bimmerlink, veepeak, dash command, elm obd2, carly obd2 car scanner, JScan, repair solutions 2, torque pro, bootmod3, FIXD OBD2 Scanner, autocodes, DtcFix, DTCs Fix, obd jscan, OBDocker, torque lite, ScanMaster, car scanner, Dr. Prius, Carly, HobDrive etc. If you use any of those tools already, keep on using them along with OBDQuest to get more insights of the fault code and ease your car diagnostics. Key Features: 1. Interpretation of over 85,000 OBD2 codes 2. Multilingual support in English, French, Italian, German, Portuguese, and Spanish 3. Extensive coverage across various auto makes and brands 4. Detailed insights for each code search, covering potential symptoms, likely causes, primary components affected, recommended fixes, estimated repair costs, and risk assessment. 5. Unlimited code searches, empowering you to tackle any issue with confidence. OBDQuest isn't just another OBD2 app; it's your trusted companion for navigating the complexities of car diagnostics. Don't let trouble codes hold you back; harness the power of OBDQuest and drive with confidence. EULA - End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy : https://obdquest.com/privacy-policy/
Screenshots
Verdict
The clearest difference is rating: OBD Quest at 5.0 against iOBD2's 4.0. OBD Quest also leads on update cadence (every 3 weeks vs every 3 months). iOBD2's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. OBD Quest sells 3 in-app purchases, starting at $9.99 per month. iOBD2 asks for nothing beyond the download.
OBD Quest holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: iOBD2 has 19 ratings behind it against 1, so its average is the more settled of the two.
iOBD2 ships an update every 3 months, OBD Quest every 3 weeks. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.
| Parameter | iOBD2 | OBD Quest |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (19 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 28.6% of reviews | — |
| Number of ratings | 19 — better | 1 |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 4.3 — better | 14.0.0 |
| Further details — not scored | ||
| Size | 44 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | 翔宇 金 | Shop Booster Ltd |
Customer experience
iOBD2
OBD Quest
In-app purchases
iOBD2
No in-app purchases
OBD Quest
- Monthly Pro Plan$9.991 Month
- Yearly Pro Plan$99.991 Year
- Pro Plan for 3 days only$0.99
