Looks like they're adding it for Droid now too.

https://www.kickstarter.com/projects/velocitip/uno-the-science-of-archery?ref=discovery

I'd like the droid app...but I guess I'm not smart enough. I can't find the app. I only find the article stating it is under development and they need financial support to make it happen.

I guess I'll have to stick with the old fashion method until they are done.

Its essentially a graph...that we have been using since the early 80's