Great app, I’m learning a lot myself! It has all the Presidents, when you select a President it gives you their dates in office, who was/is the Vice President, First Lady, when their birthday was/is, and fun facts!
In addition, there is a section of “Did you know?”. At the bottom of the screen, select menu and you are able to hear and see the words to “Hail to the Chief”. There is also a quiz section to test your knowledge.
It’s available for your iPhone and iPad. I checked Andriod and didn’t see this specific app, but did see other apps for US Presidents.