Customers are allowed to vote for the next location by texting in.
"It's given us a massive marketing push," says Wilson.
The Auckland designer, who set up her business with the support of knitwear designer Caroline Sills and her husband, Lloyd, in October 2003, introduced a diffusion shoe line, Miss Wilson, in February 2011.
The Miss Wilson line has been a "massive" success leading to a 35 per cent growth in the business' sales in the last financial year, says Wilson.
Miss Wilson sells into stores that don't stock Kathryn Wilson, shoe stores and department stores rather than the fashion boutiques which are the Kathryn Wilson domain.
"Miss Wilson launched at the right time in the market when things were starting to slow down, it's been great for us," she says.
Both lines are being exported to Hong Kong and Australia, with China and Japan likely to be next.
An upmarket little girls' shoe range which includes patent leather riding boots and loafers is to be launched in March 2013 targeted at grandparents.
"It enables us to reach a new audience," says Wilson.
The designer has a number of brand partners which help raise the Kathryn Wilson profile.
"We are brand ambassadors for Veuve Clicquot, BMW and Hilton," she says. Wilson is also the face of the AMP scholarship programme.
"It's about being the personality behind the brand."
And while the Sills remain 50 per cent shareholders of her sub-$2-million-turnover company, it is likely they will sell their shareholding in the coming years. At the moment, Lloyd Sills handles Wilson's freight and distribution.
"It's a neat partnership, it leaves me to run the business," says Wilson, who is based above the Caroline Sills shop in Devonport.
The three-year strategic plan is for a store in Wellington and, in five years, Christchurch and Dunedin or Queenstown-as well.
When she has a question, she consults designer Karen Walker, model agency owner Sara Tetro, or TV producer Julie Christie.
The finalist for the Ernst & Young Entrepreneur of the Year 2011 has an advisory board, with finance and IP experts.
"Karen Walker said to make sure that I had someone creative as well as financial on the board," says Wilson. So the financial advisers couldn't shut down every creative idea. She has appointed Droga5's James Polhill.
Wilson has already been approached by people wanting to invest in the company. "[The Hyperfactory's] Derek Handley keeps saying, 'When can I buy into your business?'."