Called Ping and available on iOS devices, it will send notifications to your phone's lock screen based on whatever categories you choose.

After downloading the app, it brings you to a screen with several categories listed on it, including practical ones like "Apps worth downloading" and "Trending on Twitter", media reports said.

Ping does not ask for usernames, passwords or permission to access your contacts.

"It draws information from somewhere to send you the notifications based on the categories you requested," its designer Ben Lee wrote on a blog post.

There are a total of nine categories of notifications to choose from, said Secret's CEO, David Byttow, adding that Ping "adapts to you, and evolves itself" as people use it, the reports added.