personalDNSfilter VS Trail-Sense

Maybe try https://www.zenz-solutions.de/personaldnsfilter-wp/ https://github.com/IngoZenz/personaldnsfilter btw: its on FDroid Store too

I recommend personalDNSfilter (GitHub) as the on-device filter, which then gets passed through to nextDNS or any other DNS of your choosing. Been using it for over a year, it's superb, but I wish we had something as powerful as Portmaster (desktop-only for now, although the team has considered Android, and they thought it is a viable option)

personalDNSfilter (version 1.50.53.5): DNS request based Host Blocker over local VPN using a Blocklist

If you want DoT support then you can try personaldnsfilter

I've been looking into doing something similar and stumbled upon a method that uses personalDNSfilter with OpenVPN for personalDNSfilter, which is a special version of the OpenVPN for Android app.

You could try personalDNSfilter ... https://www.zenz-solutions.de/personaldnsfilter-wp/

Android Update: fix can be obtained (on a non-rooted phone) by using the Personal DNS Filter app (install from PlayStore). This app allows to manipulate DNS by creating a VPN.

Here's our GitHub page and here our website. Here you can see a video of personalDNSfilter in action.

personalDNSfilter (version 1.50.50.1): DNS request based Host Blocker over local VPN using a Blocklist

Not sure if this is what you are looking for

Trail Sense

I didn't see FairEmail mentioned yet https://email.faircode.eu/ and also the TrailSense multitool https://github.com/kylecorry31/Trail-Sense is one of my favorites. Plus I prefer AdAway over AdGuard.

I think trail sense on fdroid can do this, also has compass, metal detector, and other tools that can be useful for camping/hiking. https://github.com/kylecorry31/Trail-Sense

Trail Sense (version 4.6.0): Use your phone's sensors to assist with wilderness treks

Monochromatic, Phyphox, Quicktiles, RadioDroid, TrailSense

So many apps single apps, most of which you could delete and safe spaceif you were to use Trail-Sense