Objective: To analyze the current situation and associated factors of fitness APP usage among college students. Methods: By using three stage compound sampling method, 2 171 college students were selected, and a binary Logistic regression model was established to analyze the influencing factors fitness APP usage. Results: The rate of fitness APP usage among college students was 61.9%, with significant differences by grade, physical health perception, fitness awareness, fitness purpose and exercise frequency( χ 2=28.01, 37.15, 214.12, 32.23, 316.21, P <0.01). The Logistic regression analysis showed that, grade( β = -0.31 ), fitness awareness( β =0.46), fitness purpose (improving health, β =0.52, weight loss, β =0.65), APP user friendliness ( β =0.34) and specific type of sports (running, β =1.24, racket movement, β =0.80) were associated with fitness APP usage( P < 0.05 ). Gender( β =0.30), major ( β =0.01) and exercise frequency ( β =-0.29) have less effect on fitness APP usage among college students( P >0.05). Conclusion College students have a high level of acceptance and usage of fitness APP. Grade, fitness awareness and purpose, sports type and fitness APP design are prominent factors affecting fitness APP usage among college students. The personalized custom design of fitness APP could be improved for college students.