This study investigated the impact of developing learning app via handheld devices based on some self-regulated learning strategies for improving English writing skills and motivation among intensive English language preparatory program students. The sample was chosen from English language preparation program students at college of sciences and Arts. The random sample consisted of (n=40) students. Those students were divided into two similar groups, Experimental and Control groups. To collect the data of the study, the Authors used a pre-posttest, interviews with the students and a motivation scale. T-test was used to compare between the two groups at the pre and post-test. The results revealed an observed improvement in writing skills, motivation, and attitudes for the benefit of experimental group. Moreover, the findings revealed that there were statistical differences between pre and post-test for the experimental group. No differences were found, according to the control group.