What are the types of mobile e-book format? There were several common mobile e-book format: JAR format: The Java Applet e-book format is suitable for mobile applications that support Java. 2 MOBi format:MOBi(MobileBook format) is a widely used e-book format originally developed by Apple for mobile devices such as the iPhone and iPad. 3. E-book format:ePUB and the browser format are the popular e-book format that can be read on many mobile phones and tablets. 4. PDF-format: PDF-format is an electronic file format that can be read on a variety of devices, including smart phones and tablets. 5. TMT format: The TMT format is a simple text format suitable for reading on a desktop computer. However, many mobile applications are unable to display all text files larger than 2MB. The above are the common mobile e-book format. Different mobile phones may support different format. Therefore, when purchasing e-books, please make sure that the format is supported by the mobile phone.