It's Take Your iPad to Work Day

Unless you use a Web-based mail tool like Gmail, device-specific mail apps are pretty well established and can be configured to manage multiple accounts such as personal and work e-mail. The same goes for calendar / schedule apps. Donor databases, however, are complex, and it is unlikely that sufficiently capable apps exist on all platforms. But all devices have Web browsers, so a browser-based database system is best as long as it can cope with being used in a variety of browsers and can scale from small screens to large. The only catch is you need to be connected to the Internet to use them.