The free app, called Fashion Up, will only be available for iPhone and iPod Touch devices initially. An Android app is planned for later this year.
Fashion Up’s content will include fashion trends, celebrity style features, street style, and fashion and beauty how-to guides as well as exclusive music content.
It will available globally and created by the same team that puts together the monthly Asos print magazine given to all customers free of charge.
Layout for the mobile magazine pages will be specifically designed for smaller screens and it will include click to buy functionality so that fans can buy products directly from the pages.
Available from today (3 September) weekly content will be delivered to users every Monday.
The first issue features an exclusive acoustic performance form indie band Two Door Cinema Club and nail guide from WAH Nails salon.