You receive both with IONOS: a useful online version and the Office 2021 offline installer for your devices. This means you can access your documents, spreadsheets and emails via a web browser from anywhere, and also install an offline version of the software. With just one subscription, you can install Microsoft 365 on up to five devices of your choice. If you are working from a device that doesn't belong to you without an installed version of Microsoft 365, simply use the web browser to access the online version. This means you can be flexible and productive, no matter where you are or whether you are connected to the internet or not. What's more, our Microsoft 365 plans also include the Office mobile apps, so you can install your Office 2021 on your Android or iOS device. These apps enable you to continue to work using up to five mobile devices, even without a working internet connection — perfect for while traveling through regions without a network connection or when in airplane mode.