OBD2 Logger is made and published by Daehyun Nam. AppBrain is an independent app data site and isn't affiliated with Daehyun Nam. The app name, icon, screenshots and description belong to Daehyun Nam and are shown as published on the App Store.
AppBrain's verdict
- Last updated
- June 15, 2026
Rankings
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Releases
Updates seen on the App Store- Version
- 1.1.0
- Launched
- May 2026
No changelog data
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Technology
Found in the app by AppBrain- Price
- Free
- App size
- 2.57 MB
- Content rating
- Everyone
Technologies used by OBD2 Logger
About the app and developer
About OBD2 Logger
OBD2 Logger is an utilities app developed by Daehyun Nam.
User Ratings
The app has no ratings yet.
App Information
OBD2 Logger is freely available from the App Store. The app size is 2.57 MB. The latest version available is 1.1.0. The last update was on June 15, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since May 2026.
Developer information for Daehyun Nam
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Frequently asked questions about OBD2 Logger
Is OBD2 Logger free?
Yes. OBD2 Logger is free on the App Store.
Is OBD2 Logger still available?
Yes. OBD2 Logger is on the App Store, and the last update we saw was on June 15, 2026.
How large is OBD2 Logger?
OBD2 Logger is 2.57 MB.
Is OBD2 Logger suitable for children?
App Store rates the content of OBD2 Logger as suitable for everyone.
Who made OBD2 Logger?
OBD2 Logger was developed by Daehyun Nam. It is listed in the utilities category on the App Store.
Store listing
By Daehyun Nam, from the App Store
Description by Daehyun Nam Written by the developer, not by AppBrain. Click to read.
LIVE READOUT
• 40+ standard SAE J1979 PIDs, automatically discovered from your car: RPM, vehicle speed, coolant temp, throttle, MAF, intake MAP, fuel trims, catalyst temperatures, and more.
• Manufacturer-specific Mode 21 PIDs on profiled vehicles — including HV pack voltage, MG1/MG2 motor torque, and battery cell-block temperatures on Toyota/Lexus hybrids.
• Values grouped by category (Engine, Hybrid, Battery, Emissions, Diagnostics) and updated every second.
• One CSV per logging session, written into the app's Files container — open it in Numbers, Excel, pandas, DuckDB, or any other tool with no preprocessing.
• Wide-table format: ISO-8601 timestamps, one column per active PID, blank cells where the ECU returned no data (no spurious forward-fill).
• Smart-stop after extended idle so you don't end up with a tail of empty rows when you forget to tap Stop.
WORKS IN THE BACKGROUND
• Keeps logging while you drive with Maps in the foreground or the screen off, using Apple's standard background location mode for trip-tracking apps. The system location indicator is shown the entire time. We don't store your location.
VEHICLE PROFILES
• Ships with three profiles: a generic Mode-01 fallback, a Toyota hybrid family profile, and a 2020 Lexus RX 450h/450hL profile validated against a real vehicle.
• VIN auto-read on connect; year, make, model, and trim pre-filled from NHTSA's free public vPIC API.
• Import any third-party profile JSON to add coverage for your car. The format is documented and human-readable.
DON'T HAVE AN ADAPTER YET?
• Tap "Try demo mode" on the second onboarding step to explore the app end-to-end with synthetic data — no hardware required.
WHAT YOU NEED
• Any Bluetooth Low Energy ELM327 adapter (Veepeak OBDCheck BLE+, vLinker MC+, OBDLink, etc. — most BLE clones work). USB-only and Wi-Fi-only adapters are NOT supported.
• A car with an OBD2 port (1996+ in the US, 2001+ in the EU).
PRIVACY
• Nothing is collected, transmitted, or stored on our servers — we don't have servers. The only outbound call the app ever makes is one VIN decode per vehicle to NHTSA's vPIC API.
• Your CSVs and vehicle records live in the app's Files container, accessible to you in the iOS Files app under On My iPhone → OBD2 Logger.
• Open source: github.com/NathanNam/obd2-logger