Ask HN: AdGuard for Android or another alternative

Currently, I have a PiHole server running on my machine, but I can't keep it running 100% of the time as a DNS server for my internal network. Therefore, I looked for an Android alternative and found AdGuard Blocker. It seems to work by creating an internal VPN and routing data through it, applying the filters. However, I'm concerned about data security since I don't have access to the code.

Do you know if this tool is safe, or if there is any other open-source project that offers the same functionality?

Any help would be appreciated.