Picster - Caption and Hashtag is a mobile application available for download on the App Store for iOS devices such as the iPhone, iPad, and iPod touch.

The application is designed to provide users with the option to add captions and hashtags to their photos, enhancing their social media content. This feature can improve the visibility and discoverability of their posts on various platforms that utilize hashtag functionality.

It could be particularly beneficial for social media influencers, digital marketers, or general users looking to improve their engagement or organize their posts.

Furthermore, the application has a rating and review system which can provide prospective users with opinions and experiences of current users to facilitate their decision-making process regarding the download and usage of the app.

However, further specifics about the functionalities, features, and user interface of the application are not provided in the text.