Is it an app? Well, yes, but "enhanced ebook" might be just as good a term. This is not a thing with sound effects and pop-up play with tricky lighting and swirling fonts. It's a book. A literary experience. You read it, interacting in a choose-your-own type way, only instead of picking which door to open or which dragon to fight, you're having a dialogue with Victor Frankenstein.
What's it like? You don't need to go by my opinion - here's what others have been saying:
"Stunning." - Tim HarfordBut why take their word for it? Anyone with $4.99 and an iPad, iPhone or iPod Touch can see for themselves. And quite a few have already: it's at #2 in UK books and #13 in the USA today. You can get Frankenstein from the App Store in the UK here and US here.
"Very clever." - Professor John Sutherland
"Nicely done." - Stephen Fry
"A nuanced take on monstrosity... Extremely poignant." - Dr Dale Townshend