With this carpenters app you can: 
• Calculate optimal of panelling boards.
• Calculate the amount of materials you need to e.g. cover a deck, and save a shopping list. 
• Enter two values, and calculate the rest of the sides and angles in a trigonometric calculator.
• Rapid division of slats, spindles, fences, etc. 
• Calculate width of last panel in roof panels, laminate, tiles, etc.
• Measure angles with on-device gyroscope/accelerometers.