APP, short for application, refers to an Internet program developed specifically for use on mobile electronic devices such as an iPhone or iPad.Its like a window, or access point to a software program or Web site that's been optimized to run on a smaller screen and use less computing power. For example, if you regularly log onto Facebook from a computer but want to get there on a mobile device like on Iphone or Droid, theres no need to use the Web browser.

Just download the Facebook app, and with the tap of a finger, access a version of Facebook that's designed to fit the smaller screen, use  less battery power, and offer features better suited to uses on the go.

Interior Design Apps are on the go now. Some are free but most you have to pay for, usually around .99-4.99. Some of the Apps tested from Traditional Home are: Remodelista

(2.99) A design app of home-furnishing and accessory ideas, product reviews, and gorgeous imagery. Looking for the perfect couch, stylish DIYs or inspiration to refresh your space. Its an online sourcebook followed by Gwyneth Paltrow and stylists and architects.

Dream home HD

(99 cents) Provides inspiration that helps you discover your stye. Scroll through professionally styled and photographed rooms. Full-color images are strikingly brilliant, and the "favorties" button lets you put together a file of top picks and develop a cohesive look that will make you feel like a designer.

Moodboard pro

(2.99) Organizes your inspirations, letting you cut and paste images from personal files and Web sites like a design pro, then pull it together in your own Moodboard.

Epicurious

(free) Searches for and saves recipes, compiles shopping lists and allows you to view instructions and photos more easily then with a desktop or notebook computer.

Cool Hunting

(free) A style blog that covers some of the coolest products and trends for your home, travel, fashion and food categories.

Zillow

(free) A real estae shopping app that allows you to browse listings, set parameters, save and e-mail favorites, view photo galleries and satellite images and receive updates as new listings come in.