The research was designed in a randomized controlled experimental type in order to determine the effect of mobile application on students' knowledge levels and satisfaction levels about the prevention, treatment and care of pressure injuries. The population of the study conducted in the fall semester of the 2020-2021 academic year consisted of students enrolled in the Basic Principles and Practices in Nursing course at a foundation university in Istanbul between March and June 2021 (N=78). The sample size was calculated with G power 3.1.9.4, based on similar studies, and it was calculated that at least 28 people should be included in each group, with the pre-acceptance of α error being 5%, research power (power) 80%, and an effect value of 0.77.

Research data were collected using the "Structured Description Form", "Modified Pieper Pressure Wound Knowledge Test" and "Satisfaction Scale".

The research was designed in a randomized controlled experimental type in order to determine the effect of mobile application on students' knowledge levels and satisfaction levels about the prevention, treatment and care of pressure injuries.

Research Hypotheses Hypothesis 1 (H1) The knowledge level of nursing students using mobile applications in teaching the care and treatment of pressure injuries is higher than the students receiving education with the classical method.

Hypothesis 2 (H2) Nursing students who receive education using mobile applications in teaching the care and treatment of pressure injuries have higher education satisfaction levels than students who receive education with the classical method.

Universe and Sample The population of the study conducted in the fall semester of the 2020-2021 academic year consisted of students enrolled in the Basic Principles and Practices in Nursing course at a foundation university in Istanbul between March and June 2021 (N=78). Power analysis (NCSS-PASS Statistical package) was performed to determine the number of students who would form the research sample. The sample size was calculated with G power 3.1.9.4, based on similar studies, and it was calculated that at least 28 people should be included in each group, with the pre-acceptance of α error being 5%, research power (power) 80%, and an effect value of 0.77. In this direction, 58 students who met the study criteria formed the sample of the study. In the randomization of the study, students were assigned to the experimental (n=29) and control (n=29) groups according to their numbers in the class list using the www.random.org program. Research data were collected using the "Structured Description Form", "Modified Pieper Pressure Wound Knowledge Test" and "Satisfaction Scale".

Inclusion Criteria:

Nursing students;

• be 18 years or older,
• Not having graduated from Health Vocational High School,
• To be registered for the first time in the Basic Principles and Practices in Nursing course, to fully participate in the interventions to be applied in the study.
• Volunteer to participate in the study.

Exclusion Criteria:

Nursing students;

• be under the age of 18,
• Having graduated from Health Vocational High School,
• Having taken the Basic Principles and Practices in Nursing course before,
• Not participating in the initiatives to be implemented in the study,
• Not willing to participate in the study