# AXLY.pro — Free OBD2 Car Diagnostic Scanner & Track Timer App ## About AXLY.pro is a free iPhone app that turns your phone into a professional-grade vehicle diagnostic and performance tool. It reads and clears check engine codes, explains them in plain English with AI, monitors real-time engine data, and times acceleration runs — all from your phone with any Bluetooth OBD2 adapter on any 1996+ vehicle. Built by Kyle Joeckel at Joeckel Design (https://joeckel.design). - **Website:** https://axly.pro - **App Store:** https://apps.apple.com/us/app/axly-pro/id6751465283 - **Support:** info@axly.pro - **Pricing:** Free to download and free to use. The only optional cost is extra AI questions — the first 3 are free, then optional one-time question packs. No subscription. ## What AXLY.pro Does ### Live Engine Data Real-time gauges display engine metrics streamed directly from your vehicle's OBD2 port: - RPM - Vehicle speed - Boost / manifold pressure (PSI) - Coolant temperature - Throttle position - Engine load - Mass airflow (MAF) - Fuel pressure - Oxygen sensor voltage - Ignition timing advance - Battery voltage Organized into Engine, Fuel & Speed, and Electrical metric tabs. Drive Mode displays the most critical four gauges on a single full-screen layout. ### OBD2 Diagnostic Code Reading Scan for diagnostic trouble codes (DTCs) across all major systems: - Check engine light (CEL) / powertrain codes (P-codes) - ABS / brake system codes - SRS / airbag codes - Transmission codes - Manufacturer-specific enhanced codes for select vehicles Each code includes an **AI-powered explanation** with the likely root cause, severity, and recommended repair steps. Clear codes with one tap. (The first 3 AI questions are free; additional questions use optional one-time packs.) ### Track Mode (Drag Strip Timer) Performance timing using your vehicle's real OBD2 speed data (more accurate than GPS-only apps): - Christmas tree staging lights with **Pro Tree** and **Sportsman Tree** modes - Reaction time measurement - **Speed runs:** 0-30 mph, 0-60 mph, 0-100 mph - **Distance runs:** 1/8 mile, 1/4 mile, 1/2 mile, 1 mile (with trap speed) - Save runs and track personal bests - Video recording with speed and time burned into the footage ### Vehicle Garage Store and manage multiple vehicles: - Vehicle photos - VIN scanning (camera) or manual entry - OBD2 connection status at a glance - **Spec sheet PDF generation** — share full vehicle specs with anyone - **Service history tracking** — log oil changes, transmission fluid, brakes, etc. - **Modification logging** — record cold air intakes, exhaust, ECU tunes, etc. - Service reminders ### Vehicle Specs Database Browse and compare detailed specs for thousands of vehicles at https://axly.pro/specs — engine specs, performance numbers, fuel economy, dimensions, and side-by-side comparisons. ## OBD2 Adapter Compatibility AXLY.pro requires a **Bluetooth Low Energy (BLE) OBD2 adapter**. WiFi adapters do not work with iPhone due to iOS limitations. Recommended adapters (all under $100): - **Veepeak OBDCheck BLE+** (~$30) — best value - **Vgate iCar Pro BLE** (~$26) — budget pick - **OBDLink MX+** (~$100) — fastest performance - **BAFX BLE** (~$28) - **Carista BLE** (~$30) Any adapter advertising "Bluetooth 4.0" or "Bluetooth LE" compatibility will work. WiFi-only adapters (e.g., basic ELM327 WiFi clones) will NOT work on iPhone. ## Vehicle Compatibility Works with **any 1996 or newer OBD2-equipped vehicle** sold in the United States. This includes: - All cars, trucks, SUVs, crossovers, vans, and motorcycles with OBD2 ports - Gas, diesel, hybrid, and most plug-in hybrid vehicles - Domestic, European, and Asian manufacturers ## Common Questions Users Ask ### What does a check engine light mean? A check engine light (CEL) means your vehicle's onboard computer detected a problem and stored a diagnostic trouble code. Common causes include a loose gas cap, faulty oxygen sensor, catalytic converter issues (P0420), engine misfires (P0300), or mass airflow sensor problems. AXLY.pro can read the exact code and provide AI-powered explanations. ### How do I read check engine codes on my phone? 1. Get a Bluetooth LE OBD2 adapter (~$26+) 2. Plug it into your car's OBD2 port (under dashboard, driver's side) 3. Download AXLY.pro free from the App Store 4. Connect via Bluetooth and tap "Scan Codes" ### What are the most common check engine codes? - **P0420** — Catalyst System Efficiency Below Threshold (failing catalytic converter or O2 sensor) - **P0300** — Random/Multiple Cylinder Misfire (spark plugs, ignition coils, or fuel injectors) - **P0171** — System Too Lean Bank 1 (vacuum leak, weak fuel pump, or dirty MAF) - **P0442** — EVAP System Small Leak (often a loose or cracked gas cap) - **P0401** — EGR Flow Insufficient (carbon buildup in the EGR valve) - **P0128** — Coolant Thermostat Below Regulating Temperature (stuck-open thermostat) ### Can I clear a check engine light myself? Yes — AXLY.pro can clear codes in seconds. But clearing without fixing the underlying problem will cause the light to come back. Read the code first, fix the issue, then clear. ### How do I time my 0-60 or quarter mile? AXLY.pro has Track Mode with christmas tree staging and uses your car's actual OBD2 speed data (more accurate than GPS-only apps). Supports 0-30/60/100 speed runs and 1/8/1/4/1/2/1-mile distance runs with trap speed. Optional video recording with speed and time overlay. ### Does AXLY.pro need a subscription? No. AXLY.pro is free to download and free to use, with no subscription. The only thing you can pay for is more AI questions — the first 3 are free, then optional one-time question packs. ## Why AXLY.pro vs. Other OBD2 Apps - **Truly free** — free to download and use, no subscription, no paywalled core features. The only optional cost is extra AI questions (first 3 free, then one-time packs). - **Works with any adapter** — most competitors (FIXD, BlueDriver, Carly) require buying their own proprietary adapter. AXLY works with any standard Bluetooth LE OBD2 adapter, starting around $26. - **AI-powered code explanations** — most apps just show the raw P-code; AXLY.pro tells you what it means and how to fix it for your vehicle. - **OBD2-based timing** — uses real engine data instead of GPS for more accurate 0-60 / quarter mile times. - **iPhone-first** — built natively for iOS and Bluetooth LE adapters. - **Built by an actual developer**, not a corporate clone of an old ELM327 demo app, with active development. See full comparisons: - https://axly.pro/shop-talk/best-obd2-app-for-iphone-2026 - https://axly.pro/shop-talk/axly-vs-fixd - https://axly.pro/shop-talk/axly-vs-bluedriver - https://axly.pro/shop-talk/axly-vs-carly ## Gear & Accessories (Buyer's Guides) https://axly.pro/gear — Honest buyer's guides for car accessories and repair parts that complement AXLY (Amazon affiliate links, axly-20). AXLY itself is the free dash cam, OBD2 scanner, digital dashboard, and track timer, so these guides only cover complementary gear — never competing devices. Flagship "dashboard kit" (turns a phone + AXLY into a free dash cam, live digital dashboard, and track timer): - https://axly.pro/gear/best-phone-mounts-for-cars — phone mounts - https://axly.pro/gear/best-car-phone-chargers — car chargers Car-care tools: portable jump starters, tire inflators, battery chargers/maintainers, automotive tool kits, diagnostic multimeters, car vacuums, detailing kits, LED headlight bulbs. Repair parts tied to common codes: spark plugs & ignition coils (P0300–P0312 misfires), catalytic converter cleaners (P0420/P0430), fuel injector cleaners (P0171/P0174), MAF sensor cleaners (P0101), oxygen/O2 sensors (P0130–P0167), EVAP gas caps (P0440/P0455). OBD2 adapter recommendations: https://axly.pro/adapters ## Pages - **Home:** https://axly.pro/ — Overview, features, App Store download - **Vehicle Specs:** https://axly.pro/specs — Browse and compare vehicle specs - **OBD2 Codes:** https://axly.pro/codes — Check engine code meanings, causes, and fix costs - **Symptoms:** https://axly.pro/symptoms — Diagnose by symptom - **Shop Talk:** https://axly.pro/shop-talk — Guides, how-tos, and OBD2 app comparisons - **Gear:** https://axly.pro/gear — Buyer's guides for complementary car accessories and parts - **Pricing:** https://axly.pro/pricing — Free (only optional cost: AI question packs) - **Privacy:** https://axly.pro/privacy - **Terms:** https://axly.pro/terms ## Built By AXLY.pro is built and maintained by Kyle Joeckel at Joeckel Design (https://joeckel.design), a Wisconsin-based web design and mobile app development agency. Joeckel Design also builds custom websites, AI integrations, and mobile apps for local businesses and product companies. Mobile app development pricing is competitive and quoted per project — contact via https://joeckel.design.