Top five wine classification, appreciation and food pairing applications on your iPhone this week:

Drync Wine Pro
Drync Wine Pro is a portable wine cellar database application that you can update on the go. Users can search through over one million different wines, read through other people's reviews and save the wines that interest them to their Virtual Cellar for future reference. Users can also enter in personal images of bottles they have in their personal cellar that may come from smaller, unknown vineyards, not listed in Drync Wine's catalogue. There is also space for the user to enter tasting notes, the price you paid for the wine, and your personal rating.
Price: $4.99 in the US app store

Wine Ratings Guide
Nirvino's Wine Ratings Guide puts over one million wine ratings in the palm of your hand. The application combines wine reviews with a food paring guide and provides you with the approximate price you should pay for a bottle of wine. Users can search for the perfect bottle with a search feature that can filter results by name, food paring, flavor profile, grape variety, price, region and producer. A "Quick pick" feature helps you to choose the perfect bottle of wine at the store when you are in a rush.
Price: $1.99 in the US app store

Wine Enthusiast Guide
The Wine Enthusiast Guide application has been designed by the team at the Wine Enthusiast Magazine. The app will help you to select wines that match your tastes. Wines are listed in alphabetical order and come with thousands of professional and consumer reviews. You can keep a record of the wines you like or have tasted. You can also search through the online catalogue by price, rating, style, variety or region. The application will help you learn about wine and increase your vocabulary with its 1,400 word wine dictionary and over 20 illustrated tutorials.
Price: $4.99 in the US App store

Pair It!
Pair It! is a food and wine matching application that will help you to select the perfect bottle of wine to accompany your food, or the right food to accompany your wine. There are over 20,000 different suggestions put forward by expert wine pairing expert and chef, Bruce Riezenman. You can add your own notes to the 1000+ dishes ranging from entrees to deserts and the wine library of over 180 wine varietals from around the world.
Price: $2.99 in the US app store

Snooth helps wine connoisseurs search for the best wine prices locally. Snooth has a database of around one million wines and sources its prices from over 11,000 wineries and bottle shops worldwide (though is mostly US oriented). The search feature enables you to look for a specific brand or type of wine at a certain price from a cellar in your area. Users can also search by keyword, postcode, store, price, vintage and or country.
Price: Free in the US app store