The development of Industrial Revolution 4.0 is very rapidly evolving, characterized by all areas connected through internet systems or cyber systems. The development of information technology leads to learning innovations, one of which is mobile learning. The COVID-19 virus is currently hitting the world. The closure of educational institutions due to the COVID-19 outbreak caused teachers to be instructed to teach through online learning platforms. Mobile learning is a learning model that uses mobile devices such as smartphones, tablets, etc. Students’ lack of student interest can be improved by applying comparative methods and often used by students. The Jember region has many ancient relics, one of the antiquities in Jember is Kamal Site. Kamal Site has the potential for historical learning following KD 3.4. The method used is comparative research with a quantitative approach. The study sample was 36 students of SMAN Arjasa. Data collecting used questionnaires via a google form. Questionnaires were measured using a Likert scale. Researchers used a sample paired t-test. The results showed that the post-test value was higher than the pre-test value. Thus there is an increase in Student Interest after implementing mobile learning using WhatsApp. Before implementing mobile learning using WhatsApp the score of students was 30,31 and increased to 36,97. There is a different significance in the test results effect size of 0.66 with the medium category.