The rapid development in the world of technology and communication has contributed directly to the teaching and learning process in schools. Therefore, a paradigm shift towards learning methods in the education system needs to be implemented to meet the educational aims of the 21st century. This is due to the current methods of delivery in teaching and learning are still conventional. Therefore, this study aims to develop Trig-GO apps for mathematics in secondary schools by focusing on the topic of trigonometry. The development process of this application is guided by the model of Dick, Carey and Carey. This paper describes the design and development of Trig-GO apps prototype based on Design and Development Research (DDR) methods and approaches.The findings of the study indicated that a prototype of the Trig-GO application has been developed. The results of the development of the application prototype were evaluated through qualitative methods. The data was obtained from five experienced teachers and six students via observations, interviews and document analysis. Therefore, the results of the analysis showed that the Trig-GO application prototype developed need improvement. Thus, this also will give impact to the quality and production of the application prototype. It is expected to assist students in solving trigonometry questions at the highest level. The development of this prototype application is intended to assist teachers in providing teaching aids that can be used in the teaching of trigonometry through a digital approach.