Learn how to connect to CIRCLE
CIRCLE has its own custom APK. It already includes the Android v5.59+ connection fix, so you can install this instead of the generic Growtopia.apk above.
Download from official releases and install the APK.
Open PowerTunnel → ☰ → Host Settings → Host list URL.
Click Copy URL and paste it into PowerTunnel.
Set Update period to On start, then press Start.
Open the installed Growtopia.apk and click Play.