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FTR, WireGuard also available in F-Droid repo for all Android 5.0+ devices.[0]

> If your device has a custom kernel containing the WireGuard module, then the module will be used for superior battery life and performance. Otherwise a userspace version will work sufficiently on all other devices.

[0] https://apt.izzysoft.de/fdroid/index/apk/com.wireguard.andro...

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For Google Pixel devices, we're actually prebuilding and distributing WireGuard kernel modules for use in that app:

https://github.com/WireGuard/android-wireguard-module-builde...

I'm assuming these modules require superuser access, correct?

Yea, kernel-wireguard on Android is just for people who have rooted their phones and want a little extra adventure. Cellphones have weird networking stacks and unusually written drivers (I'm looking at you, qcacld and rmnet_perf...), so supporting WireGuard's kernel module on Android has been very worthwhile to us for fine tuning things. Plus the performance is as good as can be in kernel space. But it's definitely something for "rooters only."

I'm sad that it doesn't support older versions... There are still many users on these devices.

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