Licences and credits

City data

City names, locations and time zones come from GeoNames (geonames.org), licensed under the Creative Commons Attribution 4.0 License (CC BY 4.0). The data is stored on our own server and has been reformatted for the app.

The world map's country outlines come from Natural Earth (naturalearthdata.com), which is in the public domain, prepared by the world-atlas project (ISC licence). Borders are drawn as they are in practice and don't express a view on any dispute.

Open-source software

Allirha is built with open-source software, including React Native, Expo, Voltra, Fastify, Drizzle ORM, PostgreSQL and Next.js. Each is used under its own licence (mostly MIT, Apache 2.0 or the PostgreSQL License); their copyright notices are included in the respective packages.