No. Currently Keepmark is a desktop application. However, documents are stored in a user-accessible form and can be synchronized with mobile devices, e.g., using services like Drobox or the WebDav protocol.
A link to the files for Windows/Linux/Mac will be sent immediately to the email address provided after submitting the form on the home page.
Currently Keepmark has no support for OCR (recognizing text from image files). However, it is not excluded that this possibility will appear one day.
Keepmark can store any files that are on your computer. Moreover, it previews many popular document formats, allowing you to view them without having to open them in a dedicated application.