The development of the application to support tourism in Samut Songkhram province aims to develop accommodation search applications. Hotels attractions OTOP products to promote the distribution of OTOP products in tourist attractions to assess satisfaction with developed applications using AppSheet Google Sheet Google Map and other open-source software to develop and surveys to collect data assess satisfaction with built applications. Perform statistical data analysis Percentage average standard deviation The results showed that the application to support tourism in Samut Songkhram province Help promote comprehensive tourism in Samut Songkhram Province Enhances the distribution channels of OTOP products in tourist attractions. The results of the satisfaction assessment from 50 users in the sample system showed that users were satisfied with the application to support tourism in Samut Songkhram province with an average of 4.41 standard deviations of 0.06. Can be used.