Remux – an open-source tmux workspace client for iPhone

Overview

Remux is an open-source tmux workspace designed for iPhone. The project is hosted on GitHub under the user h3nock and was introduced via a Show HN post.

Technical foundation

The app relies on the Citadel SSH library, which itself uses NIOSSH under the hood. One commenter questioned whether NIOSSH incorporates a model for handling spotty connectivity, comparing it to Mosh.

"I don't know much about the SSH this app uses (Citadel) which uses NIOSSH under the hood. I prefer using Mosh for mobile apps where connectivity is often spotty. Does NIOSSH use a model that accounts for that?"

User experience and features

Remux presents a tmux workspace interface on iOS. A commenter asked whether multiple panes can be viewed simultaneously, indicating uncertainty about the app’s pane layout capabilities.

"Any way to see multiple panes at the same time?" Another user noted that the app connects well and feels fast, comparing it to Termius but highlighting its tmux support.

Security model

A commenter raised a question about the app’s security model, specifically asking if it only supports local network access.

"I think this is a very cool effort. ... Question for you — what is your security model? It seems like this only supports local network access, is that correct?" The post and comments do not provide a definitive answer regarding remote access or authentication mechanisms.

Community feedback and comparisons

Several commenters expressed interest in the app, noting its usefulness compared to existing tools:

• One user mentioned using a PWA over Tailscale for similar functionality and welcomed a native alternative.
• Another compared the app to Blink.sh with Mosh, praising session persistence but noting interface awkwardness.
• A user asked about arrow‑key support on the keyboard.
• Requests were made for additional features such as voice support for Claude and fwknop/port knocking integration.

Related projects

Commenters referenced other tools that share similarities with Remux:

• zmx, which also provides attach/detach functionality and uses libghostty.
• ghostty, whose ecosystem was noted as enabling many projects.
• iSH, a terminal environment for iOS that has not been updated in three years.

Conclusion

Remux offers a native iPhone client for tmux workspaces, built on the Citadel/NIOSSH SSH stack. While the community has shown enthusiasm and raised practical questions about multi‑pane viewing, keyboard input, security, and connectivity handling, the available source material does not confirm answers to those questions.