His collection inspired him to work with a team to create an app called, "Hanx Writer". The app is a classic typewriter emulator. The sounds are authentic and it's pretty functional.
I fiddled around with this a bit, and it's super neat, super fun and I recommend playing with it.
As I write this, I realize I should have checked to see if it's available in multiple formats but I didn't, I can confirm the iPad app is available.