OBD Compass vs Diagnose AI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OBD Compass
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The Bluetooth OBDII scan tool is loaded with essential features such as full OBDII functionality. Key Features: 1. Vehicle health check, read vehicle faults. 2. Various visual data such as numerical values, waveforms, and dials. 3. n-depth analysis of fault codes, including causes of generation, potential impacts of fault codes on vehicles, maintenance suggestions, and estimated costs, etc. 4. Maintenance records and reminders. 5. Community and Knowledge Base.
Diagnose AI
This app transforms your phone into an automotive health assistant. It connects to your car's OBD-II system via Bluetooth to translate fault codes into plain English, offering AI-powered diagnostics and DIY action plans. Manage multiple vehicles and review scan history for informed repairs.
- AI-powered plain-English diagnostics
- One-tap Bluetooth OBD-II scanning
- DIY action plans and guidance
- Multi-vehicle garage management
- Full scan history
- Premium dark automotive interface
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Know what's your car is telling you Bruh.. and what to check before you buy one. Diagnose AI turns OBD-II fault codes, warning lights, recall information, and guided vehicle checks into clear findings you can act on. FOR YOUR CAR • Connect a compatible Bluetooth OBD-II adapter • Understand stored and pending trouble codes in plain English • See how urgent a problem may be and what to check next • Save your vehicles and scan history • Ask follow-up questions about a completed scan BEFORE YOU BUY • Enter a VIN to review available recall campaigns • Follow a guided visual inspection • Add supported OBD-II findings when available • See what needs attention, what needs review, and what was not checked • Export a Buyer Report to keep or share No adapter yet? No Worries Try the demo scan and explore the experience without connecting to a vehicle. Diagnose AI provides informational guidance and does not replace a qualified mechanic, professional pre-purchase inspection, official recall-repair confirmation, or vehicle history report. Vehicle and adapter support vary. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: OBD Compass at none against Diagnose AI's 2. OBD Compass also leads on update cadence (monthly vs every 4 months) and iOS requirement (13.0 vs 15.0). On price, ads 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. Diagnose AI sells 2 in-app purchases, starting at $2.99 per month. OBD Compass asks for nothing beyond the download.
OBD Compass ships an update monthly, Diagnose AI every 4 months. The most recent releases landed on October 16, 2026 and October 23, 2026 respectively.
| Parameter | OBD Compass | Diagnose AI |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Monthly — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 25 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | HK TOPDON TECHNOLOGY Co., LIMITED | Shivansh Chhhabra |
In-app purchases
OBD Compass
No in-app purchases
Diagnose AI
- Pro Monthly$2.991 Month
- Pro Yearly$19.991 Year
Questions
Is OBD Compass free?
Is Diagnose AI free?
Do OBD Compass or Diagnose AI have ads?
Which is updated more often, OBD Compass or Diagnose AI?
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