5 bucks or so. We were traveling at the time. It's a lightweight app
But puts photos in chronological order. Events store each day in a separate
Folder. Inside each folder is the order and time taken.

The problem I had was my ipad2 had too little memory and
My raw files filled it quickly.

The iPhoto app only stores a smaller food JPEG. The raw files are
Stored on the iPads photo memory. To remove them from iPhoto you
Have to remove the original file.

iPhoto app might be your solution, Neil