You can build a PirateBox for as little as US$35! Pick which platform is best for yourself and you should be able to have your PirateBox up and running in just a few minutes.
Many different routers support running custom OpenWRT images and thus running the PirateBox. Check the list of supported devices. In case you run into any problems, the troubleshooting page has solutions for the most common problems.
No matter if Raspberry Pi 1, 2, 3 or zero, we got you covered. The only thing you will need is a USB WiFi stick capable of AP mode and you are good to go. In case you run into any problems, the troubleshooting page has solutions for the most common problems.
Jochen Ruehl has created a PirateBox App for Android which is available for download on Google Play. Jochen has also shared the APKs for those who are not running Google Apps.