Nailing the perfect paint color. Leveling a shelf. Rendering a 3-D floor plan. Yep, there's an app for all of those challenges. Home decor is getting some mobile love, so let these apps inspire your next project — or take you all the way to the finish line. Martha Stewart Living
COOL MEASURING TOOLS
IHANDY LEVEL
How it works: Place your mobile along the top of the frame as you would a standard level; after a quick calibration, this digital version uses sensors embedded in the phone to assess whether the surface is straight.
Why it's great: Never hang another crooked picture! Testers at technology-product review site CNET found the level to be consistently accurate within one degree. It's also pretty, with a wood-grain background, giving it an old-school toolbox feel.
Specs: Free; iOS only
EASYMEASURE
How it works: Tape measures are so last century. With this app, you point your phone's camera at the furniture or wall art you're considering. The app uses the lens' tilt angle and height to calculate the item's size, and lets you save the dimensions so you can compare it to other pieces you're looking at.
Why it's great: You can eliminate the paper trail as you hop between stores and flea markets in search of the perfect end table or wall mirror.
Specs: $2.99; iOS and Android
CLEVER DESIGN AIDS
PHOTO MEASURES
How it works: After getting the dimensions of the space you want to decorate, snap a picture of it. Then type all the measurements — furniture, windows, ceiling heights — directly onto the image.