System Requirements
PrimeCal is a web-based SaaS app. All you need is a modern browser and an internet connection — there's nothing to install on your computer.
Supported Browsers
| Browser | Minimum Version | Notes |
|---|---|---|
| Google Chrome | 90+ | Recommended |
| Mozilla Firefox | 88+ | Fully supported |
| Microsoft Edge | 90+ | Fully supported |
| Apple Safari | 14+ | Fully supported |
| Opera | 76+ | Chromium-based, should work |
Internet Explorer is not supported. Very old versions of the listed browsers may experience layout issues or missing features. Keep your browser updated for the best experience.
Network Requirements
- Internet connection — PrimeCal loads from app.primecal.eu and requires an active connection to access your calendars
- JavaScript enabled — PrimeCal is a React application and will not function without JavaScript
- Cookies allowed — Session cookies are used for authentication; make sure your browser isn't blocking them for
app.primecal.eu
Screen Size
PrimeCal adapts to any screen size from 320 px wide (small phones) upward. The layout automatically switches between a mobile view (bottom tab bar, touch-friendly controls) and a desktop view (sidebar navigation) based on your screen width.
Mobile App
The PrimeCal mobile app is available for Android and iOS. It runs the same web app with native device integration.
Android
- Minimum OS: Android 8.0 (Oreo) or later
- Recommended: Android 10 or later for the best performance
- Download from the Google Play Store
iOS
- Minimum OS: iOS 14 or later
- Recommended: iOS 16 or later
- Download from the Apple App Store
The web app at app.primecal.eu works great in a mobile browser too. You can add it to your home screen for an app-like experience without installing from a store.