Hi, Sowmya! Welcome!
We don't have an app, but the site is responsive, meaning that you can do anything on your mobile as you can on a laptop or tablet.
AND you can easily make the site an icon on your screen, so it looks, moves and quacks like an app.
Here's how:
iPhone
1. Call up the site via the Safari browser on your phone.
2. In the bottom navigation bar, you'll see a square with an arrow pointing up. Tap on that.
3. When the dialogue screen pops up, tap on "Add to Home Screen".
Android
1. Call up the site via a browser on your phone.
2. Tap on the menu button.
3. Tap on Add to Home Screen
For other systems and tablets, go to this article on HowToGeek.com.