OBD Quest vs Plier
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
Read full descriptionHide full description
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/
Plier
Transform your iPhone into an AI-powered car diagnostic tool. Connect to your vehicle via an OBD2 device to understand its health, diagnose issues, and estimate repair costs.
- AI-driven diagnostic reports
- Real-time OBD2 data and graphs
- Check engine light insights
- Repair cost estimation
- ELM327 Bluetooth compatibility
- Troubleshoot engine codes
Read full descriptionHide full description
Turn your iPhone into a clear, capable OBD2 car scanner with Plier.AI. Connect a compatible Bluetooth ELM327 adapter to read diagnostic trouble codes, view live sensor data and graphs, and understand check-engine warnings. The new Vehicle Health Center brings together a health snapshot, mileage-based maintenance planning, official NHTSA recall checks for saved vehicles, inspection-readiness guidance, and a report you can share with a mechanic. Ask the AI Mechanic vehicle-aware questions about symptoms and active codes. Plier suggests practical tests, explains possible causes, and helps you decide what to check before replacing parts. You can also review supported freeze-frame and oxygen-sensor test data. Available data varies by vehicle, adapter, protocol, and model year. AI guidance and health scores can be wrong and are not proof that a vehicle is safe. Confirm safety-critical findings with a qualified technician. Some features require Plier Pro. Terms of Use: https://plier.ai/tos
Screenshots
Verdict
The clearest difference is ads: Plier at none against OBD Quest's shown. Plier also leads on update cadence (weekly vs every 3 weeks) and ratings volume (15 vs 1). OBD Quest's advantage is rating (5.0 vs 4.6). On price, in-app purchases, monetization model 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 and Plier sells 2 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.
OBD Quest holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Plier has 15 ratings behind it against 1, so its average is the more settled of the two.
OBD Quest ships an update every 3 weeks, Plier weekly. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.
| Parameter | OBD Quest | Plier |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.6 (15 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 15 — better |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 14.0.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 54 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Shop Booster Ltd | Heap Labs LLC |
Customer experience
OBD Quest
Plier
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
Plier
- Pro (Weekly)3 Days trial$6.997 Days
- Pro ( 1 Year )$49.991 Year
Questions
Is OBD Quest free?
Is Plier free?
Which has better reviews, OBD Quest or Plier?
Do OBD Quest or Plier have ads?
Which is updated more often, OBD Quest or Plier?
Other comparisons















