A calculator developed by a 12-year-old girl and her Irish father has become the number one-rated app worldwide on Amazon's Android App Store.

Yahoo is buying online blogging forum Tumblr for $1.1bn (€856.6m) as chief executive Marissa Mayer tries to rejuvenate an internet icon that has fallen behind the times.

Ryanair has announced record annual profits of €569m for the year ending March 31.

Enniscorthy-based Chevron Training and Development Ltd has successfully exited examinership.

Yahoo is on the verge of buying online content-sharing site Tumblr in a 1.1 billion dollar deal.