Yes, the Encyro website works from any device with a modern web browser, including Windows PCs, Macs, Android devices (smartphones, tabs), and iOS devices (iPhones, iPads).
There is no limit to the number of devices you use to login to your Encyro account.
In fact, if you use it from a mobile phone, you can also take a picture and attach directly to your secure message. For instance, if asking a client to send you a picture of some document (e.g. voided check, insurance card), you could send them your Encyro upload page link and ask them to use it from their smartphone. Try it yourself by accessing a demo upload page, https://www.encyro.com/bob, from a mobile device and you will see a button “Attach or take photo”.
All account settings are available from a mobile device as well.