Licences

The app’s code: MIT

AirTruth’s source code is released under the MIT licence:

MIT License

Copyright (c) 2026 AYERIQ AI LABS

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

The air quality data: CC BY-NC-SA 4.0

The MIT licence covers the code only, not the readings the app shows. Those come from OAQ, run by the Rainmatter Foundation with Aurassure, which publishes them under Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International.

Anyone who uses the data must:

• attribute OAQ, the Rainmatter Foundation and Aurassure, and the monitoring networks named in the app;
• not use it commercially, which includes advertising, paid features and selling access to the readings;
• share alike: a dataset derived from it must be shared under the same licence.

That is why AirTruth is free, with no ads, no purchases and no analytics, and why its Welcome screen, About screen and share image name OAQ.