Not as a separate App Store or Google Play app right now. Newsibly works perfectly well saved as a pseudo app to your phone's home screen from the browser.
On iPhone, open Newsibly in your browser, tap the share or menu button, then choose Add to Home Screen. Once added, it opens in a clean app-style window.
On Android, open Newsibly in your browser, open the menu, then choose Install app or Add to Home screen. If your phone offers both, Install app opens Newsibly in an app-style window, while Add to Home screen keeps it opening in your normal browser.
If you have signed in within the last 7 days, Newsibly should log you in automatically when you open it again.