I picked this up, so I thought I would provide feedback to both the OP as well as any potential buyers.
Some nice features specific to this app that I have not seen elsewhere (or are at least noteworthy)
*Links to youtube/sf4tube videos of the characters
*Links to the SRK forum for the characters
*Character profile data (height, nationality, etc.)
On the balance, the app is quite good and very much functional. As best I can tell the data is accurate, and things are more or less logically organized. I would say that is is a very passable guide and will get the job done. Of the few apps I have used for this purpose, I would say it is probably the best and the one I will continue to use.
With that in mind though, I do see several opportunities for improvement.
HITBOX PICTURES- These appear to just be screenshots of a magazine clipping and you can’t zoom in at all. Also, while I was able to figure out the ordering of what moves were which, labels in English would be a welcome addition. The thought is nice, but overall usability is quite low.
*SCREEN FLIPPING- Everything is vertical view until you go into frame data and you must go horizontal. Give the option to pick one orientation and stick with it. Having to flip the screen is jarring.
*SPLIT FRAME/HIT DATA- This was clearly designed with phones rather than tablets in mind. You have to go to two separate screens (which take a long time to load for some reason) to get the full hit data AND frame data. On my Nexus 7 I think I could easily see the full frame/hit data on one screen. If nothing else seeing the damage on the frame data screen would be useful rather than saying “wow, that looks really good!.. wonder how much damage it actually does?”
I would say the app is probably already worth the buck and change, but fixing the issues above would cause it to have my unquestioned recommendation.