Everyone is getting bent out of shape. Just use whatever app you like best. I have 5 apps installed that I'm testing including Sync.
That being said, my 2 cents regarding Sync: I don't mind paying for a great app like Sync, but I'm not crazy about subscription models. I know there is a one time option but $100 for a mobile app is beyond nuts.
EDIT: $100 is for the lifetime "ultra" plan. It's $20 to remove ads.
I just noticed some other comments mentioning that and didn't realize there was a different one-time fee to remove ads. I only initially saw the "ultra" subscription options. You're right though, $20 is a bit high but not too far off. I would pay $10 if I was sure this was the app for me. It's honestly a nice looking app. I never used Sync for Reddit. My favorite was always Relay.
Whatever you do, it's important to support app developers. Definitely don't manually set your DNS to dns.adguard.com on your phone, to block all ads in apps
Super don't use 94.140.14.14 and 94.140.15.15 as the primary and alternative addresses for systems that don't accept URLs to DNS servers. You would block (some of) all the ads on any Internet connected device!