With the popularization of mobile technology and the explosion of apps, Chinese college students can use mobile apps to improve their English ability. While there is considerable enthusiasm for using apps to support learning with their multimedia capabilities, portability, connectivity, and flexibility, there is a paucity of research evidence about whether such approach can facilitate English learning for college students and what students’ attitudes are towards the new approach. Besides, there is a lack of research about which apps are good and suitable for them in specific aspects of English studies, such as spoken English, reading comprehension, listening or writing.In order to figure out them, the semi-interview survey and experiment are used in our study. The interviewees were 5 college students studying at USST or SDTU, China. They talked about their attitudes towards using apps to study on their own. In the experiment, the subjects were 15 exchange students, now studying at the University of Borås. The experiment examined the effect that college students use mobile devices to learn English by themselves.The finding suggests that the new learning approach is effective and helpful for college students to improve English by using their mobile devices, as well as undergraduates are willing to use apps to learn English with self-regulated learning approach instead of traditional learning approach. Some apps well suited for college students are presented. Based on the findings, we provide useful instructional strategies for college students to learn English by themselves in the end.