櫻坂46メッセージ is a free Android application developed by Sony Music Solutions Inc. It belongs to the Lifestyle category and offers features such as Talk, Blog, and News. The app allows users to subscribe to their favorite members to receive exclusive messages like photos, videos, and text messages.

The Talk function requires a monthly subscription, which is automatically renewed every month after the initial sign-up, and the user can turn off the auto-renewal feature before the end of the subscription period. Additionally, users can send fan letters to their favorite members for a fee. The app provides templates for both card and letter types, which users can choose based on their preferences.

The app also offers Blog and News sections that allow users to check the official blog and news of the group. With the update notification feature, users will not miss any updates from the group. Overall, 櫻坂46メッセージ is a great app for fans of the group who want to stay up-to-date and connect with their favorite members.