In development · Kleinau Finance

Your AI coding sessions, in your pocket.

Dex is a native iPhone and Mac app that lets you monitor and control Claude Code, Codex and other CLI sessions across all your Macs from one place, so agentic coding feels like an everyday app, not a terminal.

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Native SwiftUI · iPhone & Mac · built for Claude Code

Dex working
Working
Dex waiting for you
Needs you
Dex done
Done

Every session gets its own little Dex. One glance tells you which agent is working, which one is waiting for you and which one is done.

Dex on the Mac: sidebar with sessions that need you, pinned chats and a Claude Code session asking for permission
Dex on the iPhone: chat list with quick replies to approve or answer agent questions

Design preview of the current build (UI in German). Interface details may change before launch.

What Dex does

One calm place for every agent on every Mac.

All sessions at a glance

See every running Claude Code, Codex, Gemini or shell session on all your Macs, organised in projects and pinned chats.

Answer from anywhere

When an agent needs a decision, Dex surfaces it at the top. Approve, decline or reply directly from your iPhone, without opening a terminal.

Status without noise

One clear signal per session: live, needs you, error or done. Code changes show as calm diffs you can review on the go.

Native on iPhone and Mac

Built in SwiftUI with native gestures, keyboard shortcuts and motion. No web view, no browser tab.

Made for Claude Code

Dex is designed around how Claude Code works: permissions, tool steps, file reads and multi-session workflows.

Yours to customise

Each session's Dex has its own house, colours and mood. Eye colour shows the agent, so you always know who is talking.

Who builds Dex

Kleinau Finance, a software studio in Berlin.

Kleinau Finance was founded in 2024 by Maximilian Kleinau. The studio builds AI-native software on Claude: apps like Dex, bookkeeping automation for small businesses (document extraction, lexoffice integrations, XRechnung/ZUGFeRD e-invoicing) and custom SaaS for clients.

Further products in development include a trading app and a mobile game.

  • CompanyKleinau Finance
  • Founded2024, Berlin, Germany
  • FounderMaximilian Kleinau
  • ProductsDex · bookkeeping automation · client SaaS
  • Built withClaude Code · Claude API · SwiftUI · TypeScript
  • Contactinfo@kleinaufinance.com

Be the first to try Dex.

Send a short email and we'll let you know as soon as early access opens.

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