Plug iPhone or iPad into Mac
User iExplorer or iFunbox to explore file system of apps
Export relevant directories to local box (Usually Library and *.app)
Search for files of interest

find . -name "*.db"

find . -name "*.plist"

find . -name "*.sql*"
Search inside the files for items of interest
find . -type f -exec grep -l -i "password" {} +
iExplorer can […]