Abstract-The use of mobile learning has rapidly gained popularity among students and this scenario has influenced students' learning styles. Hence, students prefer to use web-based learning, courseware and online apps in their learning. Based on the advantages of these mobile learning materials and findings of research which highlight their effectiveness in learning, a preschool learning apps known as AKSES was developed based on collaborative learning strategy in an authentic learning environment. Collaborative learning is one of the most effective learning strategies in crafting students' communication skills and providing supportive environment for students. Students have the opportunities to assist their peers during the T&L process while indirectly communicating with each other. In addition, the concept of authentic learning refers to real learning based on actual situations and realities. Authentic learning exposes students to how a concept being materialised and applied in real life. A study was carried out to evaluate the effectiveness of AKSES and its impact on the preschool students' basic scientific process skills competency namely; observation, classification and communication. In addition, the study also investigated competency patterns of the students' skills. This study was a quantitative study which used two sets of instruments which looked into AKSES application and marking rubrics of the students' basic scientific process skills. Based on quasiexperimental study, the duration of the study was seven weeks and six learning activities were implemented. Two rural preschools were selected based on quo-4