> For the complete documentation index, see [llms.txt](https://zinisoft-net.gitbook.io/zapes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://zinisoft-net.gitbook.io/zapes/get-started-1/onesignal.md).

# OneSignal

Guide to set up OneSignal a free push notification service for mobile apps.