Cities are considered one of the largest emitters of greenhouse gas emissions and consume vast amounts of energy. They, therefore, play a significant role in achieving the Sustainable Development Goals (SDGs). However, the SDG indicators are reported on a country level, and city-level assessments in Switzerland are voluntary, non-standardized, and only updated in larger time intervals. The current paper focuses on applying SDG 11 as a metric for visualizing urban efforts toward achieving a broader set of SDGs. This involves a thorough assessment of each goal within SDG 11 to determine its measurability. With the Smart City Sustainability Tracker (SCST), we propose a platform based on KNIME, which can help monitor the progress in cases where sufficient data is available for doing a regression analysis. In cases where too little information is available, we propose to at least provide some process models, which can help to standardize at least the processes of collecting measurable KPIs to turn manual project work conducted in heterogeneous environments into reference processes, which can help to implement the necessary data collection more quickly. The standardization and visualization of city-level reporting could support decision-makers in developing more adequate measures to follow the trajectories of successful implementations or to detect and correct failures quickly to ensure reaching the shared goals in time. Finally, we conclude with a short validation of the potential reuse and adaptability of the SCST from the application of the city of Zurich, to cities in totally different circumstances such as for the situation of SDG11 in Pretoria, South Africa.