DMG for macOS
Download ewws and cleanly prepare the productive start.
The desktop download is the technical start. ewws becomes productive when the application, database, license, roles and rollout are set up in the right order.
iOS app
Server for Linux/cloud
Delivery on request
ewws is delivered in a controlled way. You get in touch, we unlock the download for you.
Cleanly separated steps
Installation, database, activation and productive use stay clearly separated from each other.
A reliable update path
Later versions and installers stay reachable through the same download area.
Important before productive use
- The desktop installer installs the application, not the productive database.
- Single-workstation versions are suitable for the start on a single machine.
- The data foundation stays PostgreSQL and can later be taken over into an extended operating model.
Expansion and productive use
- Several workstations or central use need the server/API and a clear network address.
- License, activation, users, roles and master data are set up after the technical installation.
- Only then does productive operation begin with real data; updates do not replace the initial commissioning.
License and activation
The download happens in a controlled way on request. ewws is used productively where license, activation and rollout are bindingly clarified.
Updates
New versions and release notes stay reachable through the same download area.
Native clients on request
You receive the full native ewws clients on request. 30 days of full functions, then Start-edition scope. The license file from your order permanently unlocks the chosen edition. Existing installations continue to update automatically.
current version
release channel
database installation separate
ewws Mac app (Apple Silicon)
A notarized DMG with the native ewws Mac app, checked by Apple and without a Gatekeeper warning. 30-day trial with all functions, then the Start edition. Your .ewwslic from the order confirmation unlocks the full edition.
ewws Windows app (WinUI 3)
A native Windows app in WinUI 3 and C# on .NET for Windows 11 and higher. The full ewws functional scope, the same data foundation as the Mac, as an MSIX package.
ewws server (Docker)
The ewws server as a Docker image. Java 25, PostgreSQL per tenant, over 900 REST endpoints. Runs on Linux, macOS or Windows, self-hosted or in your own cloud. Native installers (.deb/MSI) on request.
The companion app is in the App Store.
ewws ERP - Business Companion brings your ERP to iPhone, iPad and Apple Watch: metrics, CRM, register and time clock, connected to your own server.
Download for free
The app is free. It connects to your ewws server - or to the public demo, if you want to get to know ewws first.
Try it right away: public demo
A complete Swiss fiduciary dataset with accounting, payroll, dunning and register. The same credentials work in the iOS app and at the sign-in of the Mac and Windows app. The demo user has read access to all areas, there are deliberately no write rights.
- Server:
https://demo.pro-business.ch/api/v1 - Tenant:
demo - User:
treuhand - Password:
Treuhand-Demo-2026
Installation order
The download is the first step. ewws becomes productive only when the application, database, license, roles and operating model are prepared in the right order.
Download the installer
Download the macOS DMG and use it to install the native Mac app on your Apple Silicon Mac.
Provide the database
The productive PostgreSQL database is not part of the desktop installer. It is set up and backed up separately.
Define the operating model
A single workstation, several workstations or public cloud have different technical requirements.
Set up the server and API
The ewws server with API is a mandatory component. The native apps for Mac, Windows and iPhone work exclusively against the ewws server. Server operation under macOS, Windows, Linux or in your Swiss public cloud.
Activate the license
The license file unlocks your edition with all modules. Without a license, ewws runs for 30 days in trial mode with all functions, then with the scope of the Start edition. You lose no data and no setup when switching.
Set up users and roles
Only with users, roles, master data and a rollout does a productive ewws environment arise.
The download makes getting started easy.
Installation, activation and later updates follow a clear path, so that the download becomes a reliable ewws deployment.