Capcom is hosting a mobile sale alongside its PSN sale, and what a sale it is: all iOS titles on the list are just 99¢.
Here's the list:
Street Fighter X Tekken Mobile
Street Fighter II Collection
Street Fighter IV Volt
Marvel Vs. Capcom 2
Ghost Trick: Phantom Detective (ALL chapters are 99¢ each)
Ghost Trick is a free download, so it's just the chapters you will be forking out a buck for, which is really cheap.