The civic-tech practitioner’s journal
Practical guides for the people building city apps
Smart City App Hack is a working journal on open city data, hackathons and the civic apps that come out of them — written for developers, civic-tech staff and the municipal teams who have to keep them running.
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Latest guides
How Data Anonymization Protects Residents in Smart Cities (2026)
See how data anonymization protects residents in smart cities (), why identity data is risky, and the methods cities use to cut…
How Open Data Licenses Work: A Practical Guide (2026)
How open data licenses work: compare CC, Open Data Commons and government terms, and pick the license that fits your civic tech…
What GeoJSON Is and How to Use It: A Practical Guide (2026)
Learn what GeoJSON is and how to use it to store, inspect, edit, and convert city map data with real examples, code…
How Digital Twins Help City Planning in 2026: A Practical Guide
Learn how digital twins help city planning in - testing transit, energy, land use, and flood scenarios virtually before building, and comparing…
How to Document an API So Developers Actually Use It (2026)
Learn how to document an API so developers actually use it: a tested quickstart, accurate request and error examples, schemas, navigation, and…
How to Make a Map With Open Source GIS Tools (2026)
Learn how to make a map with open source GIS tools in , with step-by-step QGIS and GeoPandas guidance on data cleanup,…
How to Geocode an Address Dataset Without Errors (2026)
How to geocode an address dataset without errors in : clean and deduplicate addresses, pick the match level, batch safely, validate, and…
How to Build a Data Pipeline for Public Datasets 2026
Learn how to build a data pipeline for public datasets, from source selection and validation to storage, automation, and reliable civic app…
How Cities Use Lidar for Mapping: A City Guide (October 2026)
Learn how cities use lidar for mapping in to capture terrain, buildings, roads and utilities, then turn the point cloud into planning…
How Flood Sensors Give Early Warnings for Safer Cities 2026
How flood sensors give early warnings by measuring water level, rainfall and river flow, then turning each reading into a street closure…
How Smart Water Meters Detect Leaks: A Simple Guide (October 2026)
How smart water meters detect leaks using flow, pressure and temperature data, what each alert means, and how utilities confirm a suspected…
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A note from the editors
Smart City App Hack exists because the useful parts of civic technology rarely get written down — the municipal API that finally returns clean data, the hackathon weekend that turns into a pilot, the app a transit team can still maintain a year later. So we write them down, step by step, with the awkward middle left in. Whatever you are building for your city, we hope you leave here knowing the next move.
The Smart City App Hack editors
About the site
A journal for civic builders
This is a reading site about smart city technology and civic app development: open municipal data, hackathons and events, urban mobility, and the apps that residents actually use. It starts with the hands-on how-to work and widens into the wider urban-innovation picture as the questions get bigger.