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
Direct download
The Mac and Windows apps are freely available, signed, with the Mac app notarized by Apple. No request, no registration: download, install, sign in with the demo.
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 apps are free to download. ewws becomes productive with your own ewws server and your edition licence; after installation the server runs with full functionality for 30 days.
Updates
New versions and release notes stay reachable through the same download area.
Download the native clients
The Mac and Windows apps are freely available. To try ewws, sign in with the public demo below; for production you run your own ewws server.
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)
Native Windows app built with WinUI 3 and C# on .NET for Windows 10 and 11. The ZIP contains the MSIX package with certificate and install script: right-click Install.ps1, run, done.
ewws server (Docker)
The ewws server remains customer-bound: you receive it together with your licence as installation media for Linux, Windows, macOS or Docker. The public demo is all you need to get to know ewws.
See ewws before you set anything up.
The credentials for the public demo work in all three apps: Mac and Windows are a direct download above, the iOS app is free on the App Store. Type in four lines and you are standing in a complete Swiss fiduciary client with accounting, payroll, dunning and point of sale. No registration, no database of your own, no appointment.
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.
Your impression counts
Testing ewws? Your feedback goes straight to the maker.
No ticket system without an address, no anonymous queue: every response from testing is read personally by the product owner and answered by e-mail. Good ideas flow into the roadmap, reported bugs are fixed with priority.
Give feedback
What convinces you, what is missing, what gets in the way? Three sentences are enough, and no company name is required.
Report a bug
Something does not behave as expected? Briefly describe what you expected and what happened. Platform and app version help with the assessment.
The download makes getting started easy.
Installation, activation and later updates follow a clear path, so that the download becomes a reliable ewws deployment.