APXM

Empire HUD for Prosperous Universe

A browser extension for Prosperous Universe that provides both a mobile-optimised touch interface and an Empire HUD for desktop powered by the Helm galaxy map. APXM observes WebSocket traffic and displays your empire status auto-magically.

Beta

GitHub

Screenshots

APXM burn status and fleet overview panels

Desktop View

The desktop view embeds a live empire overlay on the Helm galaxy map. Open in APEX with the rPrUn XIT WEB command:

XIT WEB apxm.27bit.dev

Requires APXM extension installed. Without the extension, you'll be directed to a landing page linking to Helm.

Empire

Empire Overlay

Owned systems highlighted with burn-coloured rings (green/amber/red) on the galaxy map and in system view.

Fleet

Live Ship Tracking

Idle ship and fleet markers at systems. In-transit ships interpolated along flight paths in real time.

Burn

Burn Status Panel

Per-base burn status with expandable material-level detail, urgency filtering, sort by urgency or system name. Configurable thresholds.

Fleet

Fleet Overview

All ships with cargo/fuel bars, IDLE/TRANSIT filters, sort by ETA/name/cargo. Click to zoom into any ship.

Market

CX Warehouse Indicators

Orange dots at CX stations where you have a warehouse. Click to open inventory.

Market

CX Warehouse Dropdown

Quick access to CX warehouse inventories.

Empire

Empire Highlight

Dims the galaxy to highlight only systems where you have bases and nearby CXs.

Navigation

Gateway View

Show/hide gateway indicators and links.

Empire

Base Panels

Click any owned planet in system view for production, storage, burn overviews and BS/INV/PROD shortcuts.

Interface

Screen Switching

Assign existing APEX screens to planet panels for quick navigation.

Fleet

Ship Panels

Click any ship for cargo manifest, fuel, flight segment progress and Fly/Cargo/Fuel shortcuts.

Interface

Buffer Bridging

Panel buttons open the corresponding APEX buffer directly (BS, INV, PROD, SHP, CXM, FLT etc.)

Themes

Theme Picker

Five Helm colour themes including Colorblind mode.

Integration

rprun Detection

Detects Refined PrUn and offers ACTS button integration (can be disabled).

Keyboard Shortcuts

`B`	Toggle burn panel
`F`	Toggle fleet panel
`W`	Toggle warehouse dropdown
`E`	Toggle empire highlight
`G`	Toggle gateway view
`Escape`	Close current panel/menu

Mobile View

Overlays the APEX mobile interface with a touch-focused UI while the underlying game client keeps running.

Dashboard

Status Dashboard

At-a-glance summaries of bases, fleet and contracts. Drill-down to full views.

Burn

Burn Tracking

Per-site material burn rates with urgency indicators (critical/warning/ok). Purchase need calculation with resupply targets. Configurable thresholds.

Fleet

Fleet Overview

Ship status, destinations, ETA countdowns.

Contracts

Contract Monitoring

Active contracts with condition status and deadlines.

Data

FIO Integration

Auto-fetches data from the FIO REST API on startup if credentials are configured.

Interface

Buffer Refresh

Per-site data refresh without switching back to APEX.

How It Works

APXM intercepts the WebSocket connection between APEX and the game server using a main-world content script injected before Prun loads. Messages are decoded through Socket.IO's double-encoding layer (engine.io + socket.io framing) and fed into typed Zustand stores. The React UI (mobile) and postMessage bridge (desktop) render from those stores.

The interception and message bus code lives in @prun/link, a shared library from the APEX_ toolset (private).

APEX ↔ Game Server

↓ observed, never modified

@prun/link decoder

↓

Zustand stores

↓

APXM React UI (mobile)

postMessage bridge → Helm shell (desktop)

Install

Firefox

Coming soon on Firefox Add-ons (AMO).

Coming Soon

Chrome

Coming soon on the Chrome Web Store.

Coming Soon

Platforms

iOS / iPadOS

Orion (Kagi)

Supported

Android

Firefox

TBA

Android

Kiwi Browser

TBA

Desktop

Chrome / Firefox

Supported

Beta Testing

Found a bug or have a feature idea? Open an issue — there are templates for bug reports and feature requests.

Tech Stack

WXT — cross-browser extension framework Helm — interactive galaxy map (Pixi.js) @prun/link — WebSocket interception (private) React 19 + TypeScript Zustand — state management Tailwind CSS — mobile-first styling Vitest — unit tests

Acknowledgements

APXM is inspired by and built on the shoulders of giants — it wouldn't exist without the work that came before it.

FIO — Community game data API for Prosperous Universe Refined PrUn — Browser extension that simplifies the Prosperous Universe interface and adds useful features