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BETA  ·  7 DAY FREE TRIAL

Your AI agents.
Untethered.

Command Claude Code, OpenAI Codex CLI, and Amp from your iPhone, over any network, anywhere in the world. No port forwarding. No VPN. No desk required.

↗ Start your 7 day free trial See how it works

Card collected at checkout  ·  $9.99 / month after the trial  ·  Cancel any time

CYPHIR, LIVE SESSION
Command your AI from anywhere
Watch your agent at work, live
Every session. Always organized.
Up and running in minutes.
0
PORTS OPENED
< 5
MINUTES TO SETUP
TLS 1.3
IN TRANSIT
5+
AI AGENTS SUPPORTED

THE PROBLEM

Every AI coding agent
chains you to your desk.

Claude Code surfaces approval prompts that gate your next step. Codex surfaces the same prompts mid-refactor. Amp surfaces the same prompts. The tools that were supposed to free you are the ones keeping you seated.

Cyphir cuts the leash. Your agent runs on your machine. You review, approve, and redirect from wherever you are. The work doesn't stop when you do.

☕
COFFEE SHOP
Your agent refactors the auth layer. You approve the file write between sips.
✈️
35,000 FT
Laptop closed, seatbelt on, WiFi connected. Your agent ships the fix at cruising altitude. You land and it's already merged.
🏋️
GYM
Three sessions running in parallel. Approve the next tool call between sets.

CAPABILITIES

Everything you need.
Nothing you don't.

Cyphir is built for developers who use AI agents seriously. Every feature is purpose-built for the command and control of autonomous coding workflows.

▶
REMOTE SESSION CONTROL
Start, monitor, and stop AI coding sessions from your iPhone. Select your working directory, choose your tool, and dispatch, from anywhere on any network.
✓
MOBILE TOOL-USE REVIEW
When your agent writes a file, runs a shell command, or makes a network request, Cyphir records the action and sends it to your phone. Your approval or denial gates the next prompt in that session.
▣
MULTI-MACHINE DASHBOARD
All your connected computers in one view. See live status, active sessions, and last-seen times. Switch machines instantly without reconfiguring anything.
⌕
FULL SESSION HISTORY
Every session is logged and searchable. Find any command you gave, any file your agent edited, any tool call that was approved or denied. Full audit trail, always.
⚿
ZERO INFRASTRUCTURE
No SSH tunnels. No VPN. No ngrok. No port forwarding. The bridge daemon initiates a single outbound connection. Your firewall stays closed. Your router stays untouched.
↯
MID-SESSION INTERRUPT
Changed your mind? Tap interrupt to stop an agent mid-execution. The session is preserved so you can redirect with a follow-up prompt or close it cleanly.

SETUP GUIDE

Get your AI agent
connected in minutes.

Install your preferred AI coding tool, then install the Cyphir bridge daemon. Pair your phone with a single command. You're live.

  1. Install Node.js
    Claude Code requires Node.js 18 or higher. Install via Homebrew (recommended) or from nodejs.org.
    brew install node
  2. Install Claude Code globally
    npm install -g @anthropic-ai/claude-code
  3. Set your Anthropic API key
    Add this to your ~/.zshrc or ~/.bash_profile to persist it across sessions.
    export ANTHROPIC_API_KEY=sk-ant-...
  4. Verify the install
    claude --version
  5. Install the Cyphir bridge daemon
    This one command installs the daemon and registers it as a macOS LaunchAgent so it starts automatically.
    curl -fsSL https://api.decipherapp.com/cipher/daemon/install-cipher.sh | bash
  6. Pair in the app
    Open Cyphir on your iPhone, go to Machines, and tap Add Machine. Enter the 6-character pairing code shown in your terminal. Your Mac appears as online within seconds.
  1. Install Node.js
    Download and install the LTS version from nodejs.org. Run the installer and accept defaults.
  2. Install Claude Code (run PowerShell as Administrator)
    npm install -g @anthropic-ai/claude-code
  3. Set your Anthropic API key
    This persists the environment variable system-wide. Open a new PowerShell after running this.
    setx ANTHROPIC_API_KEY "sk-ant-..."
  4. Verify the install
    claude --version
  5. Install the Cyphir bridge daemon (PowerShell as Administrator)
    irm https://api.decipherapp.com/cipher/daemon/install-cipher.ps1 | iex
  6. Pair in the app
    Open Cyphir on your iPhone, go to Machines, and tap Add Machine. Enter the 6-character pairing code from your terminal. Your PC appears as online within seconds.
  1. Install Node.js
    brew install node
  2. Install Codex CLI globally
    npm install -g @openai/codex
  3. Set your OpenAI API key
    export OPENAI_API_KEY=sk-...
  4. Verify the install
    codex --version
  5. Install the Cyphir bridge daemon
    curl -fsSL https://api.decipherapp.com/cipher/daemon/install-cipher.sh | bash
  6. Pair in the app
    Open Cyphir, go to Machines, tap Add Machine, and enter the 6-character pairing code.
  1. Install Node.js
    Download the LTS installer from nodejs.org and run it.
  2. Install Codex CLI (PowerShell as Administrator)
    npm install -g @openai/codex
  3. Set your OpenAI API key
    setx OPENAI_API_KEY "sk-..."
  4. Verify the install
    codex --version
  5. Install the Cyphir bridge daemon (PowerShell as Administrator)
    irm https://api.decipherapp.com/cipher/daemon/install-cipher.ps1 | iex
  6. Pair in the app
    Open Cyphir, go to Machines, tap Add Machine, and enter the 6-character pairing code.
  1. Install Node.js
    brew install node
  2. Install Amp globally
    npm install -g @sourcegraph/amp
  3. Authenticate with Sourcegraph
    amp auth
  4. Verify the install
    amp --version
  5. Install the Cyphir bridge daemon
    curl -fsSL https://api.decipherapp.com/cipher/daemon/install-cipher.sh | bash
  6. Pair in the app
    Open Cyphir, go to Machines, tap Add Machine, and enter the 6-character pairing code.
  1. Install Node.js
    Download the LTS installer from nodejs.org.
  2. Install Amp (PowerShell as Administrator)
    npm install -g @sourcegraph/amp
  3. Authenticate
    amp auth
  4. Verify
    amp --version
  5. Install the Cyphir bridge daemon (PowerShell as Administrator)
    irm https://api.decipherapp.com/cipher/daemon/install-cipher.ps1 | iex
  6. Pair in the app
    Open Cyphir, go to Machines, tap Add Machine, and enter the pairing code.

HOW IT WORKS

Up and running
in under 5 minutes.

A lightweight daemon on your computer connects outbound to our relay. Your phone connects to the same relay. No ports opened on either side.

1
Create your account here on decipherapp.com
Sign up with your email and a password. Your 7 day free trial starts as soon as your account is created, then you enter a card at checkout so the subscription continues when the trial ends. The card is not charged during the trial. Cancel any time on this site.
2
Install the Cyphir app and sign in
Get Cyphir for iPhone, then sign in with the email and password you just created. Once the account exists here, there is nothing to create again in the app.
3
Install the bridge daemon on your computer
One command installs the daemon and registers it as a system service. It starts automatically and reconnects silently on reboot.
4
Pair your phone to your computer
Tap Add Machine in the app. Enter the 6-character code from your terminal. Your machine is live within seconds.
5
Start commanding your agents
Tap the compose button, choose your AI agent and working directory, and send your first command. Your agent is now under mobile command.

WHY CYPHIR

Not all remote access
is created equal.

Built from scratch for AI agent workflows, not bolted onto a tool designed for something else.

Cyphir SSH Tunnel Screen Share ngrok
Setup time < 5 minutes 30+ minutes No agent control 10+ minutes
Port forwarding required No Yes Depends Yes
Mobile-native UI Yes No Barely No
AI agent-aware Yes No No No
Tool approval flow Built-in Manual Manual None
Works on cellular Yes Firewall-dependent High bandwidth Yes

SECURITY ARCHITECTURE

We relay packets.
We do not host your code.

Your code lives on your machine. Your agent runs on your machine. Cyphir relays packets between your phone and your computer over TLS 1.3, terminated at our relay; we do not host your codebase.

[ iPhone ]  ─── TLS 1.3 + JWT ───▶ [ Cyphir Relay ]  ─── TLS 1.3 + JWT ───▶ [ Your Computer ]
  Cyphir app                        VPS, relay only                         Bridge daemon

                                                                                              ▼
                                                                                   [ Claude Code / Codex / Amp ]
                                                                                     subprocess on your machine, your filesystem
ZERO INBOUND EXPOSURE
The bridge daemon connects outbound to our relay. Your machine never accepts inbound connections. Your firewall and router are unchanged.
TLS 1.3 IN TRANSIT
All connections use TLS 1.3, terminated at the relay. Authentication uses short-lived JWTs. Bridge tokens are invalidated immediately on logout. Application-layer end-to-end encryption is on the roadmap.
YOUR CODE STAYS ON YOUR MACHINE
Cyphir does not host your codebase. Commands are dispatched as instructions to your local agent; agent output (which may include code snippets and diffs) is relayed back to your phone over the same TLS-terminated relay. Audit retention is tier-configurable.
PER-MACHINE TOKENS
Each computer gets its own cryptographic bridge token. Removing a machine from the app immediately revokes its access.

WHERE YOU SIGN UP

Your account lives here.
Your agents live on your phone.

Cyphir is two pieces: an account and an app that signs in to it. You create the account on this site, then the app picks it up. Here is the whole path, start to finish.

1
Create your account on decipherapp.com
Email and password, then a card at checkout. Your 7 day free trial starts as soon as your account is created, before the card step. The card is not charged during the trial, and cancelling before day 7 costs you nothing.
2
Sign in on the app
Download Cyphir for iPhone and sign in with the same email and password. Your trial, your plan, and your machines are already attached to the account.
3
Manage billing back here
Your plan, your receipts, and your cancellation live with the account you created on decipherapp.com. Sign in to the site any time to open your billing portal and change or end your subscription.
↗ Create your account Manage your subscription

Already have a Cyphir account? Download the iPhone app and sign in with it.

PRICING

Simple, honest pricing.

Full access during your trial, no feature gating. When you subscribe here, your card is collected at checkout so the subscription continues without a gap when the trial ends.

FREE TRIAL
$0
7 days, card collected at checkout
  • All AI agents supported
  • Unlimited sessions
  • Multi-machine support
  • Tool approval engine
  • Full session history
  • Cancel before day 7 and you are not charged
Start your 7 day free trial
CYPHIR PRO
$9.99
per month, billed after the 7 day trial
  • Everything in the free trial
  • Unlimited machines
  • Unlimited session history
  • Priority support
  • Early access to new features
  • Cancel any time from your account
Start your 7 day free trial

Subscribe here and you start with a 7 day free trial, with your card collected at checkout. On day 7 the card is charged $9.99 per month unless you cancel first. Cancel any time from your account on this site.

FAQ

Common questions.

Your code lives on your machine. Your agent runs on your machine. Cyphir relays command packets from your phone to the bridge daemon on your computer over TLS 1.3 terminated at our relay; agent output (which may include code snippets, diffs, or quoted file contents) is relayed back to your phone over the same TLS connection. We do not host your codebase. Audit retention is tier-configurable. Application-layer end-to-end encryption is on the roadmap and is not yet enabled.
No. The bridge daemon initiates a single outbound connection to our relay over standard HTTPS/WSS (port 443). Your firewall stays exactly as it is. Your router needs no changes. No port forwarding, no DMZ, no static IP required.
Currently: Claude Code (Anthropic), OpenAI Codex CLI, and Amp (Sourcegraph). Universal agent support (Cursor, Aider, MCP servers, custom API agents, browser agents) is on the roadmap and is NOT in launch scope today. If your preferred tool isn't listed, contact us at support@veridiansoftware.net.
Yes. The Windows bridge installer is available and functional via PowerShell. macOS is the primary supported platform at launch with the most testing behind it, but Windows support is fully available and actively maintained.
The session is preserved in Cyphir. When your computer reconnects, the bridge daemon re-establishes its relay connection automatically. You can resume the session or start a new one. Sessions that were in-flight at disconnect will need to be restarted.
Yes. Each computer gets its own bridge daemon install and its own pairing code. All your machines appear in the Machines tab with live status, active sessions, and last-seen times. Switch between them instantly with no reconfiguration.
There is a 7 day free trial with full access to every feature. When you subscribe here on decipherapp.com, you enter a card at checkout and it is not charged during the trial. On day 7, Cyphir Pro is $9.99 per month, and cancelling before day 7 costs you nothing. If you start a trial from the iPhone app instead, no card is taken there, and you subscribe here when the trial ends to keep access.
Subscriptions are sold here, so the simplest path is to create your account at decipherapp.com, subscribe, then download the Cyphir app and sign in with the same email and password. The app can also create an account and start a trial, but the app takes no payment: your plan, receipts, and cancellation stay here on the site either way.
Sign in at decipherapp.com and cancel from your account. Cancel before the 7 day trial ends and you are not charged at all. Cancel after that and you are not billed again; your access runs to the end of the period you already paid for.

GET STARTED

Ready to cut the leash?

7 day free trial, card collected at checkout. Up and running in under 5 minutes.

↗ Start your 7 day free trial

$9.99 / month after the trial  ·  Cancel any time  ·  Already subscribed? Manage or cancel