The app has been developed by Be Labs, a Seattle-based tech firm. It gives users complete control over their personal conversations.

The app allows you to take back your messages by controlling the feature "if and when content is deleted, immediately and permanently", media reported.

The recipients must also have the app installed on their phones for it to be effective. Strings is available for download in the iOS App Store.

New smartphone app lets you take back messages
Have you ever woken up full of regret about the messages you sent the night before? A new smartphone app could help!
Seattle-based startup Be Labs has announced the successful completion of beta testing for Strings, a new messaging app that gives users complete control over their personal conversations.
Strings is a refreshing new way for users to share information with exactly who they want and even take it back, the company said.
The app combines granular control over who sees what with multi-conversation context and rich media to create a simple and intuitive way to have interactive, personal conversations.
Control starts with allowing users to easily select who to start conversations with. Users can add or remove people at any time for the ultimate confidence in who sees their content.
Each "string" is a unique conversation, making it possible to have multiple conversations with the same people about different topics.
Strings also allows users to fluidly incorporate rich media, including unlimited-length videos and high-resolution photos, into their conversations.
Users always maintain the ability to delete a string of conversation at any time. Once deleted, the string and all its associated content is removed from every users' phone and from the Strings servers - immediately and permanently.
"Strings was born out of a need for a better way to communicate," said Edward Balassanian, founder of Be Labs.    

"We created the messaging app we wanted to use ourselves; one where we pull all the strings. By making it easy to control the context, content and audience for conversations, Strings gives us the confidence and comfort to have meaningful and personal interactions with family, friends, and colleagues," said Balassanian.
"Strings launched in October and has seen significant engagement with initial testers. During the three-month beta period, app sessions increased 700 per cent, new conversations increased 600 per cent, and in-app comments increased by 1200 per cent," said Balassanian.
"We think the time for Strings is now. With the privacy issues plaguing existing messaging apps, email, and texting, it's time we had a messaging app that gives us complete control of our conversations," Balassanian added.