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KingCoding — A Japanese-made Mac app for running Claude Code and Codex side by side in one window

A tool that lets you run Claude Code and Codex CLI in parallel from a single Mac app UI instead of the terminal. Create tasks per project and their status — in progress, awaiting review, complete — is labeled automatically, giving you an at-a-glance view of several projects at once. It includes “King Mode,” which hands the whole flow from writing specs to planning, execution, review, and completion reports over to the AI, and you can check progress or issue instructions from your phone over Tailscale. It is developed by the Japanese company Iritec and was released in March 2026.

Key Features

  • Switch between Claude Code and Codex in one UI: Install both CLIs ahead of time and pick the engine per task. No more juggling terminal windows
  • A task board that tracks progress for you: Create tasks per project and their status — in progress, awaiting review, complete — is labeled automatically. Even when several projects run in parallel, you can see at a glance what is stalled
  • Automatic progress with King Mode: A mode where the AI runs straight through from writing the spec to planning, execution, review, and the completion report. A single task can run to the end without you feeding it instructions
  • Remote control from your phone: With a Tailscale private connection and a QR code scan, you can check progress and add instructions from your phone’s browser while away. Well suited to kicking off a long-running task and stepping out
  • Built-in Git integration, terminal, and preview: Reviewing diffs, running commands in the built-in terminal, previewing output, notes, a command palette, and consulting Codex all happen inside the same app
  • Discord notifications and local storage: Completions and review requests can be sent to Discord. Data lives in a local SQLite database and is not sent to external servers apart from license authentication

Pricing

PlanPriceWhat’s included
Free trialFree (3 days)Full feature access. Reverts to read-only mode when the trial ends
Annual license10,000 yen (excl. tax) / yearUnlimited projects and tasks, King Mode, Tailscale connection, backup, and email support

One license covers one Mac. If you replace your Mac, entering the same license key lets you keep using it. As a digital product, refunds are generally not offered (critical defects are the exception).

Pricing is current as of August 2026. Please check the official site for the latest pricing.

Pros & Cons

Pros

  • Frees anyone who uses both Claude Code and Codex from managing CLIs side by side
  • Task status is labeled automatically, so progress is hard to lose track of across several projects
  • King Mode carries a single task to the end without a stream of instructions
  • Tailscale plus a QR code lets you check progress and add instructions from your phone while out
  • Data is kept in a local SQLite database, so your code is not sent to external servers
  • Documentation and support are provided in Japanese by a Japanese developer

⚠️ Cons

  • Requires an Apple Silicon Mac running macOS 13 Ventura or later; not available on Windows or Linux
  • Claude Code or Codex CLI must be installed separately, and each service’s usage fees are extra
  • The annual license does not suit anyone who wants to try it month by month, and the free period is only three days
  • Your Mac cannot sleep during remote access, so power settings need changing
  • Moving to another machine requires exporting and importing data by hand
  • The number of tasks you can run in parallel depends on your machine’s resources, and no upper limit is stated

Comparison with Similar Services

CriteriaKingCodingClaude Code (standalone)ConductorCursor
Form factorMac app (CLI front end)Terminal CLIMac app (CLI front end)AI-integrated editor
Supported enginesClaude Code / Codex CLIClaude onlyFocused on Claude CodeChoice of several models
Progress trackingAutomatic labeling on a task boardNone (you track it yourself)List of parallel sessionsNone (handled in the editor)
Phone controlYes, via Tailscale + QR codeNoNoNo
Pricing10,000 yen/year (excl. tax)Only your Claude plan feeCheck the official sitePaid monthly plans available

Who Is It For

  • People using both Claude Code and Codex who are tired of managing terminal windows
  • People juggling several projects who lose track of which task is awaiting review
  • People who want to start a long-running task, head out, and check on it from a phone
  • People who would rather not hand their code to an external service and want a local-only management tool
  • People who prefer development tools with Japanese documentation and support

Summary

KingCoding lifts AI coding CLIs from something you “use” to something you “manage.” Switching between Claude Code and Codex, automatic task labeling, hands-off progress through King Mode, and remote checks from a phone all pay off most for people running several projects at once. That said, it assumes an Apple Silicon Mac and an annual license, so the three-day free trial is the right place to find out whether it fits how you work.

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