Outta Site's List: diy

expensive app,($9.99) but reviews are great if you are planning on redesigning a room or multiple rooms,
or if you are a home decorator/wedding planner, this can be a good way to keep track of multiple customers.
can collaborate w/colleagues etc using this to share design ideas
have not tried it b/c $9.99

if you like watching shows like House Hunters to get design ideas and inspiration, this is a great app.
It’s free and lets you look at various types of rooms based on style, design and function. You can save your favorite ideas to your favorites, making it easier to look at what you want your room to look like while you are out shopping for items. App is free and available on iPhone and Android.

available for iPad too
$1.99, looks simple almost game like?
can make lists, task lists, and ideas from app

similar to Houzz Interior app, but heavy app must be connected to wifi
free or $2.99
used to help redesign

free, has color matching so that you can take a picture of a color you are trying to match, and it will automatically generate suggestions of paint numbers (their brand) that most accurately match. Also has a “Preview Colors” feature with preloaded images of kitchens, bedrooms, living rooms etc which you can choose a style of (ie country, formal, etc) and then you can “paint” the room with colors of your choice, making it easier to visualize what you want.

free and pro ($5.99) version
will run the first 5 times as the pro version
gives the #CSS3 so can be looked up on web too
if you take a picture of something it will create a palette of all the colors found in that picture-this is a really cool app that's great if you are trying to buy house accents based on the color of drapes, or of your couch etc. Good app.

has leveler, ruler, protractor, all things needed for measuring accurately; these apps are available individually, but the iHandy Carpenter is like a "toolkit" for all the apps
$1.99

VERY cool, can work with fractions instead of having to convert to decimals