I have SmallChess already, quite a good compact all round chess app. Just one thing which could be improved is to have the chess board take up the whole width of the iPhone screen. The iPhone screen is narrow enough and most other apps utilize the full width with no need for a fancy boarder. It has been updated a few times so maybe developer will make board full screen in next update.
Best iPhone Chess Apps?
Anybody has played chess on the new iOS 7? It must be awesome playing chess with the flatten design!

UPDATE:
Seeing as the chess.com app has the correspondence and a decent engine, I'm just looking for a good tactics trainer app for iphone now. Recommendations?
Saw this topic and jumped to the end. Apologies if this has already been mentioned.
I use Chessimo and ChessQuest on my iPhone 5 for tactics training.
Check them out.
I've tried few apps on my iPhone and found tChess Pro to be the best. It has very nice and carefully designed user interface, good PGN support. I have 20-30 PGN databases with me all the time with tactics, endgames, master games, book examples - this pretty much covers all my training needs.
I can't say for sure regarding engine strength - it's definitely excellent sparring partner for class B player like me. For serious full game analysis I anyway use Houdini/PC.

I've tried few apps on my iPhone and found tChess Pro to be the best. It has very nice and carefully designed user interface, good PGN support. I have 20-30 PGN databases with me all the time with tactics, endgames, master games, book examples - this pretty much covers all my training needs.
I can't say for sure regarding engine strength - it's definitely excellent sparring partner for class B player like me. For serious full game analysis I anyway use Houdini/PC.
I think that tChess Pro is the best all around app. It is useful for many things: database access, game analysis, sparring partner, online play. For each of these, some other app outshines it. But no other does all these things well.
For how tChess Pro measures up for correspondence play, see http://chessskill.blogspot.com/2013/08/correspondence-chess-on-iphone.html

Hi, I just bought tChess Pro and I would like to get a pgn files database to study on it. Any suggestion of where I could possibly find such database (doesn't need to be free)? I found many websites with tons of files, but then I would have to spend a huge amount of time clicking and downloading each small little file one by one and I wanted not to do so.

Hi, I just bought tChess Pro and I would like to get a pgn files database to study on it. Any suggestion of where I could possibly find such database (doesn't need to be free)? I found many websites with tons of files, but then I would have to spend a huge amount of time clicking and downloading each small little file one by one and I wanted not to do so.
http://www.pitt.edu/~schach/Archives/index2.html
Hi, I just bought tChess Pro and I would like to get a pgn files database to study on it. Any suggestion of where I could possibly find such database (doesn't need to be free)? I found many websites with tons of files, but then I would have to spend a huge amount of time clicking and downloading each small little file one by one and I wanted not to do so.
DB Books has a big selection of older books that have been converted into PGN format. Many can be downloaded from the free section, but some are password protected. I found some gems with some files having over 1000 positions .Chess Informant Download Store also has some big files with well annotated comments but require payment.

Hi, I just bought tChess Pro and I would like to get a pgn files database to study on it. Any suggestion of where I could possibly find such database (doesn't need to be free)? I found many websites with tons of files, but then I would have to spend a huge amount of time clicking and downloading each small little file one by one and I wanted not to do so.
DB Books has a big selection of older books that have been converted into PGN format. Many can be downloaded from the free section, but some are password protected. I found some gems with some files having over 1000 positions .Chess Informant Download Store also has some big files with well annotated comments but require payment.
The organization, and at least some of the content, of DB Books resembles Pitt Chess Archives. There may be additions. I cannot tell without comparing side-by-side. DB Books looks easier to navigate.

Add one more to the list of "Best iPhone Chess Apps" :P
My Chess puzzles app, iChess is now available for iPhone/iPad.
- Comes with ~1000 offline puzzles categorized into 3 levels
- Can purchase more puzzles based on your Fav opening line or from recent 2013 games
- Can open your own PGN puzzles file (paid ft)
Regards,
Asim

Add one more to the list of "Best iPhone Chess Apps" :P
My Chess puzzles app, iChess is now available for iPhone/iPad.
- Comes with ~1000 offline puzzles categorized into 3 levels
- Can purchase more puzzles based on your Fav opening line or from recent 2013 games
- Can open your own PGN puzzles file (paid ft)
Regards,
Asim
Downloaded iChess this morning and solved 20 problems. Good, clean interface. Seems to function well, and has some nice features.
I anticipate that I'll do a full review after more testing.
Stockfish has been updated! Actually, there're two apps running Stockfish 4 and free!
1. SmallFish
2. Stockfish
The official Stockfish app and upgraded to iOS 7.

Hi guys,
I worked a whole year on my own chess app and it just launched in the App Store plus it's free!
Take a look: https://itunes.apple.com/us/app/en-passant-chess-against-friends/id641111989?ls=1&mt=8
Webpage: http://enpassantapp.com

SmallChess is now a free app!!
https://itunes.apple.com/us/app/smallchess-free/id616577090?ls=1&mt=8