# ROS Topic Viewer — ROS 2 Topic Inspector

> ROS 2 Topic Inspector (iPhone/iPad app by Jatupon Hongweing.)

- Source: https://appshunter.io/ios/app/ros-topic-viewer/id6783347908 (this page in markdown: same URL + `.md`)
- Developer: [Jatupon Hongweing](https://appshunter.io/developer/1896471199)
- Category: Developer Tools
- Price: $2.99
- Age rating: 4+
- Requires: iOS 16.0 · 2 MB
- Languages: American English
- Released: 2026-07-20
- Data updated: 2026-08-22
- User reviews in markdown: https://appshunter.io/ios/app/ros-topic-viewer/id6783347908/reviews.md

## What is ROS Topic Viewer?

ROS Topic Viewer is an iPad-only field debugging tool for robotics engineers.

Connect directly to your ROS 2 robot over Wi-Fi using rosbridge_suite WebSocket — no laptop required. Browse all available topics, inspect live raw JSON data in a scrollable tree, and monitor message rate in real time.

FEATURES

• Connect to any ROS 2 robot via rosbridge WebSocket (ws://)
• Live connection log — see every step transparently: handshake, topic fetch, reconnect attempts, and failures
• Browse and search all published topics with message type annotations
• Inspect raw JSON data as a live expandable key-value tree
• Real-time Hz and message count per topic
• Pause to freeze data at a moment in time
• Export topic snapshot as CSV and share via AirDrop, Files, or email
• Auto-reconnect with exponential backoff when connection drops

DESIGNED FOR FIELD ENGINEERS

Onsite robot debugging without a laptop. Connect your iPad to the same Wi-Fi network as your robot, enter the rosbridge WebSocket address, and start inspecting topics immediately. No configuration, no ROS installation required on the iPad.

Compatible with iPad running iPadOS 16 or later.

## Chart rankings

- #53 in Top Paid · Developer Tools (US App Store)


## Version history (last 1 release)

### 1.0 — 2026-07-20

No release notes.

## More apps by Jatupon Hongweing

- [InspectPro: Site Reports](https://appshunter.io/ios/app/inspectpro-site-reports/id6785117106)
- [PreSolarSurvey](https://appshunter.io/ios/app/presolarsurvey/id6785245936)
- [StockPlain: Stock Screener](https://appshunter.io/ios/app/stockplain-stock-screener/id6789903193)
- [Pasuwado: Password Manager](https://appshunter.io/ios/app/pasuwado-password-manager/id6792019763)
- [PDF Editor: Sign, Edit, Merge](https://appshunter.io/ios/app/pdf-editor-sign-edit-merge/id6796535076)

All apps by Jatupon Hongweing: https://appshunter.io/developer/1896471199

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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 2026-08-22.*