"Even the toughest Kiwi bloke can up his game free with the help of his iPhone and a personal styling assistants on demand," he said.
Users and stylists are connected through the app and able to discuss personal tastes, offering tailored style recommendations directly linked to retailers' websites.
Every year New Zealanders spend more than $3.3 billion on clothing, with online retail sales rapidly increasing.
Wearit has more than 7,000 users and over 15,000 styles available.
Houlahan said the web-only service had been great and that he was excited for the app to roll out.
"We've delivered massive amounts of value to guys wanting to smarten up, girls wanting to help them, and our partner retailers."