Trefnus is designed for small to medium-sized businesses and professionals who need a reliable, secure, and easy-to-use solution. It provides the features and flexibility required to manage work efficiently without the complexity or cost of larger enterprise systems.

How do I install the app?

To install the app, you will be provided with a host link and password. Using Google Chrome, simply open the link, log in with your credentials, and follow the prompts to add the app to your device. Once installed, it will be accessible from your home screen or desktop like a regular app.

Can I use Trefnus on multiple devices?

Yes. You can use Trefnus on multiple personal devices. Simply access the app using your host link and password on each device, and install it using the install icon in the Chrome address bar. We ask that licence keys are not shared, resold, or distributed to others to ensure fair use for all customers.

What happens if I change or replace my device?

If you change or replace your device, you can continue where you left off by exporting your data from the old device and importing it to the new one. Use the export and import buttons located in the app header to move your data securely and easily.

Can I use the apps offline?

Yes. Once the app has been installed and used for the first time, it can be accessed offline. After the initial setup, key features and content are stored on your device, allowing you to continue using the app even without an internet connection, although some features may require connectivity to stay fully up to date.

Reliable business software, without subscriptions

One-time purchase. No lock-in. Data stays on your device.

Pie chart titled Activities by Category showing Fire, Electrical, Water, Health, Mechanical, Building, Security. Vibrant colors.

Project management software interface showing a Gantt chart with tasks and timelines. Bright pink header, blue buttons, and task details.

Bar chart shows staff workload distribution. Blue for conformity activities and purple for to-do tasks across six members.

Line graph showing cost comparisons over time for four options. Colored lines intersect a break-even point. Key: op1 (blue), op2 (green), op4 (yellow), op3 (red).

Risk status chart showing red for "Open" (2, 50%), orange for "Mitigating" (1, 25%), and green for "Closed" (1, 25%).

Why Trefnus is different

Offline Functionality

Keep working anywhere with full offline functionality. Our apps ensure your business continues uninterrupted, even without an active internet connection.

Features

Designed with only the essentials, our apps maximise efficiency and focus. No unnecessary features, no AI clutter, just what your business truly needs.

Data Security

All your personal and business data stays securely on your device. Our apps prioritise privacy, giving you full control and complete peace of mind.

Value for Money

Access powerful business tools for a single low cost. No subscriptions, no hidden charges, just simple, straightforward value that suits every business budget.

Software for your business

Trefnus CMMS

Smart asset, compliance and maintenance management system

Benefits:

✓ Stay compliant and organised

✓ Track assets and contracts

✓ Record service visits

✓ Plan work with calendar, Kanban & Eisenhower

✓ Access smart insights

Explore

Trefnus POS

Powerful, intuitive Point of Sale system for growing businesses

Benefits:

✓ Process sales and manage inventory

✓ Handle receipts, discounts, and customer data

✓ Offline-ready

✓ Multi-till data sync

✓ Access reports and practicle insights

Explore

Trefnus Projects

Efficient staff leave, absence and holiday tracking system for team leaders

Benefits:

✓ Track annual leave and sickness

✓ Construct team rotas

✓ Review illness with Bradford scoring

✓ Handle leave requests with leave cards

✓ Access reports and practical insights

Explore

Trefnus Staff

Efficient staff leave, absence and holiday tracking system for team leaders

Benefits:

✓ Track annual leave and sickness

✓ Construct team rotas

✓ Review illness with Bradford scoring

✓ Handle leave requests with leave cards

✓ Access reports and practical insights

Explore

Getting started

Start using your business app in minutes. Our Progressive Web Apps work across modern devices and operating systems. They are simple to purchase, quick to install and ready to use straight away. No app store required.

Explore

Purchase

Make a one-off payment for your app. No subscriptions or hidden fees. You pay once and it is yours to use.

Install

Open the app link in Google Chrome and select the Install button. The app is added to your device like a native app.

Use

Enter your email address to verify your device and start using the app immediately to manage your business on the go.

Who We Are, Where We Came From, and Where We’re Headed

We started out like many businesses, paying for software subscriptions for almost everything we did. Over time, the cost, complexity and constant dependence on third-party platforms became frustrating and restrictive.

So we built our own tools. We focused on creating practical, reliable business apps that did exactly what we needed, without ongoing fees or unnecessary features. Using modern web technology, we designed tools that were simple to access, easy to maintain and built to last.

Today, we offer those tools to you for a fair, one-off payment. This approach is a core principle of our business and it shapes every product we make. We believe software should work for you, not lock you into endless subscriptions, and that belief will continue to guide everything we build in the future.

What is a PWA

A Progressive Web App, or PWA, is a modern app that installs directly from the web and works across phones, tablets and computers. Unlike native apps, it does not require an app store download or manual updates, and it uses less storage space. PWAs install in seconds, stay up to date automatically and continue to work even with limited or no internet connection. They offer the convenience and feel of a native app, with easier access, broader compatibility and lower ongoing effort for your business.

Frequently asked questions

General

Licensing & Purchasing

Privacy & Security

PWA Technology

Support & Reliability

Although the app runs in a browser, it uses special web technologies that allow it to store essential files and data directly on your device during the initial install. When you open the app offline, the browser loads these saved resources instead of fetching them from the internet. This makes the app behave more like a traditional installed app, allowing core features to work without a connection, while online access is only needed for features that rely on live data or syncing.