Diy Home Exterior Design App . Smartdraw helps you create a house plan or home map by putting the tools you need at your fingertips. The best thing for diy home. 6 Best Free Home and Interior Design Apps, Software and Tools from www.housebeautiful.com All great dreams start off with inspiration and so when you’re about to build, you can’t have enough of it. Smartdraw helps you create a house plan or home map by putting the tools you need at your fingertips. It's a decent app for straightforward projects such as planning a deck, experimenting with ideas for extensions or working out how much furniture you can stuff into the front room.