The Web Viewer processes files in memory via a Browser over the Internet and so relies on resources being available to decrypt and display content.
There is no minimum specification apart from the Browsers the Web Viewer supports.
However, the more powerful the machine, the more memory available (not actual machine memory but memory available for use), the faster the Internet connection (5 Mb/s should be seen as a minimum), and less complex (tables and graphics) and smaller document sizes will all result in a better user experience.
Tablet and Phone devices
We don’t recommend that you use the Web Viewer on tablet devices as they do not have the necessary resources available to process documents effectively.
- iPad Air and Mini 3 have 1GB of RAM – definately not recommended as the OS uses most of this
- iPad Mini 4 has 2GB of RAM – about 700MB available for use (dependent on iOS version)
- iPad Pro has 4GB of RAM – about 2GB available for use (dependent on iOS version)
Smaller less complex documents may therefore load fine on the iPad Mini 4 or Pro. It really depends on the complexity and size of the protected documents and the amount of RAM available (make sure no other apps are loaded in memory) and whether that is enough for the document in question. A slow Wi-Fi connection will worsen the overall experience and documents may therefor load very slowly or not at all.