For developing a spa app, you must know programming and the required tools. If you want to build it for the Android platform, you must know Android app development, and if you want to launch it on the Apple platform, you must be experienced in iOS App development. There is another latest trend also in the market, i.e., cross-platform app development. It allows the programmer to use the single code base to develop native performance-like apps for platforms such as Android and iOS. Another option also exists: you can hire some experienced online beauty salon app builders that will craft an app for you.