# One OBDII — OBD2 scanner, gauges & timer

> OBD2 scanner, gauges & timer (iPhone/iPad app by ETHAN DENNY LIU.)

- Source: https://appshunter.io/ios/app/one-obdii/id6815887112 (this page in markdown: same URL + `.md`)
- Developer: [ETHAN DENNY LIU](https://appshunter.io/developer/6815887474)
- Category: Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 29 MB
- Languages: American English
- Released: 2026-10-18
- Data updated: 2026-10-20

## What is One OBDII?

A full OBD-II scan tool, live gauge clusters, racing camera, and a 0–60 timer — from one Bluetooth adapter and your iPhone.

EVERY DIAGNOSTIC FUNCTION IS FREE
• Read and erase trouble codes, with a clear warning before any erase
• I/M readiness: see whether your car is ready for a smog check
• Live data from every sensor your car reports
• Freeze frame and vehicle information, including the VIN
• O2 sensors and the O2 sensor test
• On-board monitoring results, misfire counters and EVAP
• An offline trouble-code library — look up any code, no car needed
• Scan history and PDF reports you can share

When the car doesn't answer, the app says so plainly — "ECU is not responding" — instead of guessing.

TIMER — FREE
0–60 mph, 0–100 km/h, 40–100 and more, timed from your car's own speed sensor. With no adapter it falls back to the phone's GPS and tells you, because a GPS time is a ballpark.

GAUGE CLUSTER
The free Classic cluster shows two dials and four bars, and each can show any reading your car reports.

The one-off unlock adds:
• Your own layouts on the grid — move and resize anything
• Premade cluster styles
• Shift bars, a G-meter and a gear indicator
• Every gauge face, colour and theme
• R-Cam: record video with your car's live data drawn into it, saved to Photos

Buy it once and it's yours. No subscription.

WHAT YOU NEED
• An ELM327 OBD-II adapter that uses Bluetooth LE (4.0 or later). iPhones cannot connect to "Classic" Bluetooth OBD-II adapters, and Wi-Fi adapters are not supported.
• A car with OBD-II — most cars and light trucks sold in the US from 1996 on.

No adapter yet? The demo drive replays a recorded drive through the whole app.

PRIVATE BY DESIGN
No account, no ads, no tracking. Your scans stay on your phone.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| One OBDII Unlock | $14.99 | one-time |


## Is One OBDII safe?

Not enough ratings yet to assess One OBDII.

## Is One OBDII legit?

One OBDII has limited verification signals. The AppsHunter Legitimacy Score for One OBDII is 50 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0.0 — 2026-10-18

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-20.*