title: FoodSwitch: A Mobile Phone App to Enable Consumers to Make Healthier Food Choices and Crowdsourcing of National Food Composition Data.
abstract: BACKGROUND
  Front-of-pack nutrition labeling (FoPL) schemes can help consumers understand the nutritional content of foods and may aid healthier food choices. However, most packaged foods in Australia carry no easily interpretable FoPL, and no standard FoPL system has yet been mandated. About two thirds of Australians now own a smartphone.
  
  
  OBJECTIVE
  We sought to develop a mobile phone app that would provide consumers with easy-to-understand nutrition information and support the selection of healthier choices when shopping for food.
  
  
  METHODS
  An existing branded food database including 17,000 Australian packaged foods underpinned the project. An iterative process of development, review, and testing was undertaken to define a user interface that could deliver nutritional information. A parallel process identified the best approach to rank foods based on nutritional content, so that healthier alternative products could be recommended.
  
  
  RESULTS
  Barcode scanning technology was identified as the optimal mechanism for interaction of the mobile phone with the food database. Traffic light labels were chosen as the preferred format for presenting nutritional information, and the Food Standards Australia New Zealand nutrient profiling method as the best strategy for identifying healthier products. The resulting FoodSwitch mobile phone app was launched in Australia in January 2012 and was downloaded by about 400,000 users in the first 18 months. FoodSwitch has maintained a 4-plus star rating, and more than 2000 users have provided feedback about the functionality. Nutritional information for more than 30,000 additional products has been obtained from users through a crowdsourcing function integrated within the app.
  
  
  CONCLUSIONS
  FoodSwitch has empowered Australian consumers seeking to make better food choices. In parallel, the huge volume of crowdsourced data has provided a novel means for low-cost, real-time tracking of the nutritional composition of Australian foods. There appears to be significant opportunity for this approach in many other countries.
authors.affiliation: The George Institute for Global Health, Food Policy Division, Camperdown, Australia. edunford@georgeinstitute.org.au.
authors.forename: Elizabeth
authors.identifier: http://orcid.org/0000-0003-4505-3256
authors.initials: E
authors.lastname: Dunford
authors.forename: Helen
authors.identifier: http://orcid.org/0000-0003-0389-812X
authors.initials: H
authors.lastname: Trevena
authors.forename: Chester
authors.identifier: http://orcid.org/0000-0002-8730-6015
authors.initials: C
authors.lastname: Goodsell
authors.forename: Ka Hung
authors.identifier: http://orcid.org/0000-0002-8739-7682
authors.initials: KH
authors.lastname: Ng
authors.forename: Jacqui
authors.identifier: http://orcid.org/0000-0003-3513-3340
authors.initials: J
authors.lastname: Webster
authors.forename: Audra
authors.identifier: http://orcid.org/0000-0001-8785-9659
authors.initials: A
authors.lastname: Millis
authors.forename: Stan
authors.identifier: http://orcid.org/0000-0002-8061-7590
authors.initials: S
authors.lastname: Goldstein
authors.forename: Orla
authors.identifier: http://orcid.org/0000-0002-7562-3021
authors.initials: O
authors.lastname: Hugueniot
authors.forename: Bruce
authors.identifier: http://orcid.org/0000-0002-0490-7465
authors.initials: B
authors.lastname: Neal
keywords: food choices; processed food; public health nutrition; smartphone technology; traffic light labeling