App to help Design a room

[ChangedAgainJune]

Does anyone know of good App/program for designing a room? Bought a sofa, thought, will fit in nicely, but was very very wrong!
Is there an App? Thank You.
Sorry for posting in AUBU- posted in CHAT 2 days ago, had no replies.

Android or Apple?

I always just use photoshop I want to see how something will look

What went wrong? Colour, style? Size? Can you work around it?

I ask cos I only know android apps so if you're using iPhone, can't help unfortunately.

Ipad, laptop. Sorry, did not come back sooner.
Bought new sofa and it is so so wrong: size, colour- it looks awful. Dh loves 'his' sofa and says I'm spending too much time thinking about it :)
Need help!