Keynote by Apple

Apple's presentation app comes free with every new Apple device and is much like a simplified PowerPoint packed with beautiful templates and typography. You can even use it online at iCloud.com to make presentations in Keynote even on a PC then share with anyone else.

Here's the link to the official website of this app on how to use it as a medium of presentation

https://www.swipe.to/tour/

Let me show a short video on how to utilize this application