I don't know of an app but I would center the art on the wall

Artwork should be centered over the sofa. Use the same size as on your inspro photo.

Found these at Kirklands. They come in a set of nine and are 12" square, but I thought you might be able to do something creative with two sets. The colors seem to work for your room.

How did you do that? Put it up on my wall?? That is what I am looking for... app that does that !

I already bought the digital version of the photo I posted. Just need to know what size to download and size frame

Not a pro: that is a long wall so make sure pictures are substantial, you don’t want small pieces that look like they are floating you want your pictures to look anchored...... when you buy online they have app that state show the item in the room. I have brought several rugs and their was an option to show in the room

I already bought the digital version of the photo I posted. Just need to know what size to download and size frame

That’s awesome! What size is that?

You need to measure your own wall to get the sizing that Celery shows, based on the distances between the ceiling and sofa back.

Black or white frames ? Thinking suing a mat will make the print smaller and not so overpowering?