@SpiderWeb My wrap-up of NextDNS (which I use in the router) versus Cloudflare (which I use in the browser) is
Benefits of NextDNS (free with account) over Cloudflare (free with ZT)
1. NextDNS is (much) easier to configure,
2. NextDNS has many build-in blocklists (not only ad and tracking blocklist, but also telemetry blocking of IOT devices)
3. Excellent reporting (e.g. add exception from blocked logs)
4. Optional privacy benefit to host the logs in Zwitserland
Downside of NextDNS
1. Has a limitation of 300.000 queries (only when you exceed that number that is a disadvantage)
2. Has an awkward default setting (you need to enable "allow affiliate and tracking links" when you enable blocklists, NextDNS hides your IP when it resolves those links)
3. Small company, little to no development, still lists some old unmaintained blocklists, DNS0.eu has been replaced by DNS4.eu (loss of income source for NextDNS)
Benefits of Cloudflare over NextDNS
1. Has (much) more options to fine tune firewall policies
2. Has no limitation on number of queries
3. One of the fastest and largest DNS server networks
4. Optional privacy benefit when you use WARP on your device with IP masking
Downside of Cloudflare
1. Needs Github automation to add third-party blocklists (although forking and enabling existing automatons is an easy one time setup)
2. Has a limitation of 300.000 blockrules for third-party blocklist (only when you exceed that number that is a disadvantage)
3. Free offers very limited (minimal time range) reporting of logs
Benefit 1 and 2 of Cloudflare ZT are the reason I prefer ZT in the browser
Benefit 2 and 3 of NextDNS are the reason I prefer NextDNS in the router
We use Quad9 as OS DNS on our phones and laptops, because it offers good malware protection is privacy friendly, set and forget and 100% problem free.