I've only ever played the physical version of Star Realms, but I really like it as a two-player experience - relatively quick and paced, although I've found that it can be a bit too easy for someone to get the upper hand and then steam roll. Want to pick up Colony Wars so I can combine and get a four-player going.
Always thought about checking out the mobile versions though, so might have to take the plunge at pay day.
Thanks for the heads up re: price, will update the post now.
"Determining the appropriate level of influence in somebody else's war is never a simple matter."
- Special Circumstances