Cross-platform mobile development refers to the development of mobile apps that can be used on multiple mobile platforms. In the business world, a growing trend called BYOD (Bring Your Own Device) is rising. BYOD refers to employees bringing their own personal mobile device into the workplace to be used in place of traditional desktop computers or company-provided mobile devices for accessing company applications and data. Because of BYOD, it has become necessary for businesses to develop their corporate mobile apps and be able to send them to many different mobile devices that operate on various networks and use different operating systems.

Cross-platform software (also multi-platform software or platform-independent software) is computer software that is implemented on multiple computing platforms. Cross-platform software may be divided into two types; one requires individual building or compilation for each platform that it supports, and the other one can be directly run on any platform without special preparation, e.g., software written in an interpreted language or pre-compiled portable bytecode for which the interpreters or run-time packages are common or standard components of all platforms. For examples, a cross-platform application may run on Microsoft Windows on the x86 architecture, Linux on the x86 architecture and macOS on either the PowerPC or x86-based Apple Macintosh systems. Cross-platform programs may run on as many as all existing platforms, or on as few as two platforms. Cross-platform frameworks (such as Qt, Xamarin, Phonegap, or Ionic) exist to aid cross-platform development.