The main topic of this thesis work is the development of an application whose true aim is to handle and track daily financial activities. This dissertation offers an easy and simple solution to everyone to keep track of their incomes and expenses through an iOS application, Apple watch application, a frontend webapplication and a supporting backend software. The main focus of this dissertation is to detail the used iOS application technologies such as MVP pattern, Dependency Injection, client side database handling, asynchronous tasks, WatchKit and some more. In order to increase understanding the thesis provides also example contexts to the joint usage of these technologies. Secondly the thesis work summarises the required ASP.NET and Angular 2 knowledge that are necessary to implement the client serving backend and frontend software. In order to create a whole picture of the solution under the market research section the dissertation introduces and evaluates the existing benchmarks in this field.