I downloaded it for my ipad a couple weeks ago, just to play with, but haven't had a chance to yet. When I get to it, I will let you know what I find out.
You might have better luck with something like zoho with app add on. With zoho you get a free database and then you add on all the features you want. It's a much cheap version of salesforce. Servicemonster also has their new update coming out which looks to bring it back as a top contender now.
Canva will work great for most all of your advertising needs. My wife owns a large hair salon, She is not to computer savey but she figured out how to use Canva. She loves it.
May I ask, what is your outcome or the end result for wanting to use Canva?
I've not used it yet. I use MS Publisher a lot but if its something the public will see we use a professional and my Publisher is just used for direction.