As the title suggests the above 3 services use Vpn connection to work. currently using duck duck go, is there any chance to use 3 at a time or atleast duck and net guard simultaneously.
Thanks in advance 
Netguard can load a big list of hosts and “protect” all apps. Not to mentions per app settings (deny INTERNET access), route through Tor via SOCKS, switch DNS servers etc.
Not sure what’s DDG’s value proposition beyond “easy for normies”. You’re not one. 
I know DDG’s tracking is not open source compared to others but is that secure enough, i mean it blocks all the inbuilt trackers
What do you mean it’s not open source?
How do you know it blocks ALL the trackers?
Use tc app it is good and forks of netguard.
All apps are opensource netguard for sure and it’s forks also with gpl
And duck duckgo also see there repo
NetGuard with my blocklist: Dnsbl - Divested Computing
Hey i use Developer Dan's Hosts
Should i add this also.
@human
That list is already included in my list.
I use TC since I see no one speaking for it. He he
Yes it is really a good project but need more knowledge about what to block what not to.
Of the 3, Netguard with a host file like https://divested.dev/hosts as suggested above.
@StarScreamOS
While the wildcard lists are preferred because they are smaller and more effective, I don’t think NetGuard actually has wildcard support.
So instead for NetGuard use https://divested.dev/hosts
Your right I believe, I just copied from my phone in a rush.
I’m gonna edit that post.