Mobile cloud apps and mobile Web apps are similar. They both run on servers external to the mobile device, they both store data externally and they are both accessed over the Internet with a browser. However, it is often said that while all cloud apps are Web apps -- not all Web apps are cloud apps. Simply put, not all mobile Web apps can run in a virtual environmentwithout being re-engineered. This is because a Web app may have originally been written to run and store data on a dedicated physical server in a data center. A cloud app, on the other hand, will always be written to live on virtual servers in a distributed, multi-tenant architecture and store data in the cloud.
