Mr Herewini offers them a free 14-day trial, during which he can collate the difference the website or app makes to their bottom line.
He also teaches people how to update their own websites and apps with their business details.
He can do all this from home in suburban Wanganui to anywhere in the world. He communicates by freephone, mobile phone, email, Skype and through his own website, mobiletraffic2.com
Born and raised in Wanganui, he spent some time working for Telecom. As part of that job, he was sent to a communications expo in Spain in 2000 and heard about mobile phone development.
Advertising and marketing are his passion, and an idea started brewing in his mind. He knew the technology for it didn't exist then, but that it would come.
To further his idea, he went to the Wanganui School of Design and graduated in 2005 with a bachelor's degree.
Most recently, he worked in Auckland, supplying the needs of businesses and noticed they would benefit from a smartphone presence.
Specialising in providing that meant he could return to Wanganui, work from home and enjoy the early years of his baby son, Jeremiah.
"There's no need for me to be living in the city, because I'm a passionate country boy."