# CANviewer — view CAN log and DBC signals

> view CAN log and DBC signals (iPhone/iPad app by 洋 刘.)

- Source: https://appshunter.io/ios/app/canviewer/id6775532457 (this page in markdown: same URL + `.md`)
- Developer: [洋 刘](https://appshunter.io/developer/6775317751)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 7 MB
- Languages: Chinese (Simplified, China)
- Released: 2026-06-04
- Data updated: 2026-08-06
- User reviews in markdown: https://appshunter.io/ios/app/canviewer/id6775532457/reviews.md

## What is CANviewer?

CANviewer is a CAN log viewing tool designed for automotive electronics, ECU debugging, and field analysis.

You can import ASC and BLF CAN logs on iPhone, quickly view message time, CAN ID, direction, channel, DLC, and data bytes, and filter the messages you need by CAN ID, Rx/Tx, and channel.

After importing a DBC file, CANviewer can decode raw CAN data based on the signal definitions in the DBC file, convert hexadecimal data into physical values, and plot signal trends over time.

Key features:
- Import and view ASC / BLF CAN logs
- Filter messages by CAN ID, Rx/Tx, and channel
- Import DBC files and parse messages and signals
- Decode CAN data into physical signal values
- Compare multiple signal curves
- View curves in combined or separate charts
- Display X/Y axes, units, and data ranges
- Tap a curve to inspect the exact time and value
- Works offline; imported files are not uploaded

Use cases:
- Quickly inspect CAN logs in the field
- Analyze ECU signal trends
- Validate DBC signal definitions
- Support vehicle debugging and troubleshooting
- Assist engineers during road tests, business trips, and service work

CANviewer is not intended to replace complex desktop tools. It is a lightweight and direct mobile tool for CAN log viewing and signal analysis.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| CAN Log Viewer Pro | $3.99 | one-time |



## Version history (last 3 releases)

### 1.2 — 2026-07-20

- free to download and free tries everyday

### CANviewer 1.1 — 2026-06-06

Fixed an issue where CANviewer did not appear as an option when opening ASC, ASV, BLF, or DBC files from other apps. You can now import CAN logs and DBC files directly through the share/open menu, and the app will navigate to the appropriate page automatically.

Improved the file import experience for faster log viewing and signal curve analysis in the field.

### 1.0 — 2026-06-04

No release notes.

## More apps by 洋 刘

- [J1939FaultCode](https://appshunter.io/ios/app/j1939faultcode/id6778431735)
- [Signed Base Converter](https://appshunter.io/ios/app/signed-base-converter/id6779268811)

All apps by 洋 刘: https://appshunter.io/developer/6775317751

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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 2026-08-06.*