The Guardian Mobile Innovation Lab and the Guardian US opinion desk are sending experimental web notifications tonight during tonight’s presidential debate, with real-time opinions from Guardian columnists.

These experimental alerts will supplement the news alerts sent from the Guardian’s Android app with reactions from Guardian columnists Richard Wolffe and Lucia Graves. They will be sent at key moments throughout the debate, while the Guardian app news alerts will provide only the most important updates. (The alerts can also be received through desktop Chrome browsers but unfortunately not iPhones. We’re working on a way to release iOS versions of our notifications experiments and hope to have that ready next month.)

During the debate, you will hear from the columnists with their quick takes on the candidates’ policy statements, their debating styles, and who’s winning and who’s losing.

This project is the latest installment in ongoing experimentation with notifications, part of the Mobile Lab’s mission to learn more about mobile storytelling. After the experiment, we’ll send out a survey soliciting feedback on the experience.

Questions, suggestions or observations? Drop us a note: innovationlab@theguardian.com