Introduction:
Applications are one of the most popular media that have many audiences, especially young girls. Boyd (2019) states that gender affects users' participation in virtual social networks. Mc Quail (2008) states that the high use of media is related to having a lot of time at home and people with more free time use communication technologies more. Girls are more inclined towards religious applications to meet their religious needs. According to the stated content, finding the reasons for using religious mobile applications among people in society is important and worthy of attention. Therefore, the main concern of the author of this study is the reasons for the use of religious mobile applications by young Tehrani girls, and in other words, the researcher's answer to the question is what are the reasons for the use of religious mobile applications among young Tehrani girls?
Methods:
In this research, a survey method and a questionnaire were used. The questionnaire included 6 dimensions and 28 items. The statistical population is all young girls aged 18 to 25 in Tehran, who are 888,528 people according to the official statistics of the general population census, and 384 people were selected using the cluster sampling method. In this regard, the 22 regions of Tehran municipality were classified into three clusters, including regions 1 to 5 in the first cluster, regions 6 to 14 in the second cluster, and regions 15 to 22 in the third cluster, according to their geographical location and economic and social base. Then one area was randomly selected from each cluster. So that point 2 from the first cluster, point 12 from the second cluster and region 17 from the third cluster were selected. After determining the sample size from each region, a number of blocks under each sample were randomly selected and finally the questionnaire was completed. In this research, the Kolmograf-Smirnov test was used to check the assumption of normality of the research data, which according to the results of the research variables were normal. Also, regarding the reliability of the research, Cronbach's alpha was used in the pre-test sample of 50 people, which is confirmed by the alpha coefficient of each variable (more than 0.92).
 
Results:
The studies obtained in the field of education level of young Tehrani girls show that the highest percentage of respondents is bachelor's education level with 47.9%, diploma level with 33.1% and postgraduate level with 19%, in the following ranks. It was them. Looking at the age variable, the age group of 22-25 years with 58.9% has the highest percentage of respondents, and the age group of 18-21 years with 41.1% is the next rank of respondents. According to the findings, the average reasons for the use of religious mobile applications by young Tehrani girls in the studied society is 2.73. Since the calculated t was smaller than the table t at the P<0.001 level. Therefore, the reasons for using religious mobile applications among young Tehrani girls in the studied society are at an average level. The examination of the following categories also indicates that young Tehrani girls believe that the two components of loyalty and privacy are the main reasons for their use of religious mobile applications with an average of 3.45 and 3.42, respectively. It should also be noted that the two components of functionality and practical content are the least reasons for use by Tehrani girls in the field of religious mobile applications with an average of 1.59 and 2.14, respectively. In other words, from their point of view, the effectiveness of the mentioned applications in terms of designing religious and religious issues, providing information and news in the field of religious topics, being equipped with modern technology knowledge and providing desirable educational programs is at a weak level. Also, religious applications in terms of practical content, including the presentation of attractive programs, variety of programs, desirable qualities, and easy updating, were evaluated in a low position by young girls of Tehran.
Conclusions:
The results showed that the reasons for using religious mobile applications among young Tehrani girls are at an average level. In this regard, it can be said that the weakness or strength of the performance of religious programs in the real space is effective in the causes of the tendency of young people to use the virtual space. It should also be mentioned about the variables of the research regarding the reasons for the use of religious mobile applications by young Tehrani girls that, respectively, functional content is 0.84, efficiency is 0.80, satisfaction is 0.78, privacy is 0.74, and loyalty is 0.73 in the error level. 0.05 have the most effect in this regard. The results of this research with the researches of Hojjatnejad (2017) (loyalty), Haba and Dastan (2022) (efficiency), Gutner et al. (2019) (applicable content), Blanco et al. (2020) (usefulness, ease of use and security) Ching Laing et al. (2019) (satisfaction and pleasure) are aligned. Also, according to the results of the research, it should be mentioned that the usefulness of mobile applications will create value and increase the effectiveness of the advertisements of the desired application. has a positive effect on the mobile phone and its applications. The high willingness of people who accept these applications and the reasons for using them increases the tendency towards these applications. In general, it is suggested that the relevant mobile phone companies and organizations design their mobile applications in such a way that it motivates the users to use religious mobile applications. It is also suggested that the aforementioned institutions, using mobile phone-based services, adjust their product information in the application program in such a way as to help customers find the closest and most practical religious mobile applications. Also, designers of religious mobile applications can design product information according to many programs with the aim of responding to diverse cultural and religious needs.