iHandy Carpenter ($1.99)
Whether you’re hanging a mirror or mitering crown molding, this app will come in handy. A toolbox for the digital age, the app turns your iOS or Android device into a surface level, bubble level, plumb bob, protractor, or ruler. No more stopping in the middle of a complicated task to search for a basic tool — just pull your phone out of your pocket and finish the job.
Drywall calculator (price varies)
Save money and time when purchasing drywall by using one of the many drywall calculator apps available for iOS, Android, and Windows devices. These calculators help you figure out a room’s square footage by tracking lengths and heights, removing doorways and windows, and measuring ceilings and sloping walls. They then convert the data into the exact number of drywall sheets required.