Persistent sessions
A lightweight server helper holds your shell open. Reconnect and pick up right where you left off.
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Never lose an SSH session again.
Termphin keeps your shell alive on the server through locked screens and network drops.
Free and open source.
At a glance
Clean TUI rendering
Drawn directly by Flutter, not in a web view. htop, vim, and TUIs render without broken box characters.
Encrypted local vault
Keys and passwords are sealed with AES-256-GCM, under a key your phone’s secure hardware holds.
Termphin Agent The shell runs on the server,
The shell runs on the server,
not in the app.
Even if you lock your phone or lose signal, your jobs keep running. A tiny open-source helper holds the remote shell open and reattaches instantly when you return.
The toolbox
Built for productivity.
Split screen
Two sessions side by side in one tab - htop on one machine, the logs on another. Drag the divider, swap the panes.
Files beside the shell
Browse, upload, download and rename over the same connection.
Autocomplete
Commands and paths from your own history suggested as you type. Tap one to finish the line.
Host key pinning
Every server’s key is checked on every connection. A changed key is stopped, not waved through.
Fast upload
Pick a file on your phone and it lands on the server, with its path pasted at the prompt.
Share from any app
Send a file to a server from wherever it is. Share it to Termphin, pick the machine and the folder, and you are back in the app you came from.
14 color schemes
Dark and light themes for the terminal, with font, size, cursor and padding to match.
A real text editor
Syntax highlighting in your terminal colours, find and replace, pinch to zoom.
SSH tunnels
Local and remote port forwards, saved on a machine or opened for one session.
Snippets
Save a command with arguments and run it on several machines at once.
Key toolbar
Esc, Tab, Ctrl and arrows above the keyboard, in layouts you arrange.
Action dock
A floating button for paste, snippets and fast upload.
Jump hosts
Reach machines behind a bastion, the way ProxyJump does.
Fallback addresses
One machine, a LAN and a Tailscale address - whichever answers.
Two-factor sign-in
One-time codes and PAM prompts asked for in the app.
Reconnects on its own
Retries until the network is back, and keeps what you type meanwhile.
Predictive echo
On a slow link, what you type shows before the server answers.
Connection health
A quiet warning when replies slow down or stop.
Groups
One set of coloured groups for machines, keys and snippets.
Encrypted backups
Export everything to one file, sealed with a passphrase.
AI coding agents
Built for AI agents.
Start a 10-minute Claude Code task and pocket your phone. The agent runs on your server and your session never aborts.
- Claude Code
- Codex
- OpenCode
- Gemini CLI
- Cursor CLI
- Copilot CLI
- Amp
- Qwen Code
- Kimi Code
- Aider
- any CLI agent
Pixel-perfect TUI
Spinners, progress bars, and diff views render cleanly without mangled characters.
One-tap SFTP upload
Upload files from your phone and paste their remote server path straight into your prompt.
Background execution
Long tasks keep running when your phone is locked or signal drops. Reattach anytime.
Open source
View on GitHub Every line is public.
Termphin is free and open source under the GPL-3.0. Read the code, build it yourself, or open an issue.
A fast terminal, SFTP browser with editor, snippet runner, SSH key manager, port forwarding, ProxyJump bastion chains, and biometric lock. A lightweight server helper reattaches sessions after connection drops.
Termphin maintains the connection while backgrounded or locked. If the connection drops or you switch networks, a tiny open-source Rust agent on the server keeps the remote shell running and reattaches you seamlessly upon reconnect.
Keys and passwords are sealed with AES-256-GCM on your phone, under a key its secure hardware holds. An optional PIN or fingerprint lock guards the app on top. Connections go directly to your server with host key verification. Anonymous usage analytics are sent only if you opt in. See our privacy policy.
Yes, all of it. The app is on GitHub under the GPL-3.0 (Termphin/Termphin), along with the terminal renderer (terminal_view) and the server helper (termphin-agent).
Any server reachable over standard SSH (Linux, macOS, BSD, Windows). Shell detection is automatic, with no helper required for basic sessions.
Yes. Point any profile at a jump host to route connections like OpenSSH's ProxyJump. Traffic remains encrypted end-to-end between your phone and target server.
Yes. Interactive keyboard prompts for 2FA authenticator codes (TOTP) and PAM passwords are fully supported.
Yes. Claude Code, Codex, and OpenCode run seamlessly. Your tasks keep executing when the screen locks, and TUI diffs and progress bars render cleanly. Learn more about running AI agents.
Blog
All posts How it is built, and why.
Engineering notes from building Termphin: what broke, what was measured, and what it cost.
11 October 2026
Why Termphin is open source
Termphin is now open source under the GPL. Why an SSH client should be, why that license, what it does not cover, and what it costs.
30 September 2026What's new in Termphin 1.10.0
One search for everything, copy and move on the server, search in the terminal output, and session tabs within reach of your thumb.
28 September 2026What's new in Termphin 1.9.0
Autocomplete in the terminal, an easier first run, find and replace in the editor, and a stronger lock screen.
Download
Get Termphin.
Free and open source. On Android today, with iOS, Windows, macOS and Linux coming soon.