This study aims to create a collaborative project with the combination of English picture book reading and APP creation for EFL low-achieving learners in Taiwan. The learners (N= 85) from different academic departments developed English picture book APPs. Before the APP creation, they read English picture books and reflected on the texts; they were offered courses to learn how to use APP Inventor 2. Through the collaboration in the 18-week semester, each group of the learners presented an English picture book APP with their own stories in English, illustrations, and voices. English reading performance and attitudes were evaluated both before and after the project. The project-based learning, according to the outcomes, made the learners have more positive attitudes towards English learning and become better English readers. The outcomes and contributions serve as a reference for EFL teachers or practitioners. EFL low-achieving learners, thus, could be able to display their learning output in a more confident manner.