Eustat has been using browser-based electronic questionnaires to gather the information for the statistical operation survey on time budgets since 2008, when the questionnaire was primarily used as an IT support for pollsters in management and data collection control tasks. However, Eustat saw the need to extend the use of these online questionnaires to survey respondents, foreseeing that data collection via the Internet would become the preferred method in the near future. Therefore, in the 2013 campaign, the necessary changes were made to the questionnaire and those being surveyed were offered the opportunity to complete the questionnaire directly on the Internet. This experience was very positive, as analysis of the quality of this data compared to the data gathered through other methods, such as visits and phone calls, revealed that there were no significant differences between the two; the downside was that the percentage of people who had used this method was small, at 5.27%. During the 2018 campaign, measures to increase the direct completion of questionnaires and to boost the percentage of those using the internet to complete them were reinforced. The main measures included: • Improving the usability of the Web questionnaire, changing its design completely compared to the previous one, based on past experience and on the new resources that technological developments provide. • Automation of all the processes that can be automated, to lighten the burden of answering questionnaires. • The incorporation of multimedia information with explanations of how to fill in online questionnaires. • Implementation of a single point of access for both survey respondents and pollsters, called SARW, to improve access security and to guarantee data protection. • Development of a mobile phone app for both Android and IOS platforms, as a new experimental method of collecting data directly from the survey respondent, including interconnection with the web survey, so that both methods can be used interchangeably to complete it. • Implementation of an app that manages the survey process from beginning to end, including “hot” codification and validation, known as GEDW. The purpose of the proposed paper is to showcase both the design and performance of the app developed at Eustat which was created on 9 April this year for the Survey on “Time Budgets” as a pilot project for the short-term standardization of the new method of survey collection using mobile devices (smartphones and iphone). This app has been set up to work on both Android and Apple smartphones. Furthermore, the design used in the web surveys and the design used in the app surveys will be compared due to the differences of the electronic devices used in the two mediums.