Not the newest article, but relevant https://dt.gl/cloudflare-why-the-fuss/
You can download signal via APK on signal.org/android/apk or my personal pick use molly.im what is a Foss fork of signal with some extra features
iOS is collecting for Apple, Android is Google, but Google is a advertising company. Our of the box iOS is probably better (keep in mind Apple is a closed garden and you cant really see the code). I run GrapheneOS for my daily driver. But I also have an iPad. With Adguard you can block a lot, including with the right host file Apple domains. You can also via ADB degoogle a Samsung or any other android device.
So android gives you more options when it comes go blocking trackers, apps, etc. iOS is probably out of the box a little better, but you have not much ways to lock things down.
I actually believe you should get piped… https://github.com/libre-tube/LibreTube
Wizardswap.io already does swaps between the two. But it is great to see more swaps coming. The future will be decentralized
Wizardswap.com it’s fully decentralized and has no KYC or even want Useraccounts
Madness… This is why mastodon exist