Water scarcity is a growing problem on Earth. One of the goals in Agenda 2030, whichall of the UN members adapted is to make clean water accessible by everyone and ensuresustainable water withdrawals. In order to take a step towards the solution, a companynamed Quandify has developed smart water meters to measure households’ water consumptionwhich can be installed by anyone.In this bachelor’s thesis, the author collaborates with Quandify to develop a proofof concept (POC) to investigate if it was possible to create a mobile phone applicationthat could help residents reduce their water consumption. The author uses state of artsuggestions in persuasive technology literature and usability heuristics for user interactiondesign and implements it into the application to increase the chance of user behaviourchange towards water consumption.The result is a mobile phone application where the users get inspiration and tips onhow to reduce their water consumption and lets the users see their water consumptionin real-time. The report also includes a small POC user study to rate the mobile phoneapplication with respect to usability heuristics.