We follow a clearly defined development process for developing mobile applications. That gives transparency about the whereabouts to you. The first step of the process is to understand your needs; the business topic you like to address, the target user group, the regional target, the functions you envision for your App, the requirement for offline operation, which platforms you want to address, and if you have a set design language. The first process step will provide as output a precise development requirement document.
Do you already have a precise development requirement document? Then the first process step is skipped.