Credits and open source

Effective date: 7 October 2026

One Day World is free and open source, and is built on free and open source work by others. Thank you to everyone behind it.

Data

• City names and locations: GeoNames (geonames.org), licensed under Creative Commons Attribution 4.0.
• Maps: Apple Maps.

Software

• App: React Native and Expo (MIT licence), Expo Router, react-native-maps, react-native-svg, supercluster (ISC licence), Google Sign-In for React Native.
• Server: Hono and jose (MIT licence), running on Cloudflare Workers with a D1 database.
• Moderation: Llama Guard 3 by Meta (Llama 3.1 Community License), run on Cloudflare Workers AI.

Source code

The source code of One Day World is published under the MIT licence. Contact mahmedhussain@outlook.com for the repository address.