Beware Onion Browser: iOS doesn't give (jailed) apps a way to tunnel HTML5 video, so all a site needs to do to get your IP address is embed a video object. They can do this without you noticing. I don't know if this version does a better job. It's possible, but I wouldn't just assume that.
Tor Browser - Apps on Google Play Jul 07, 2020 The Tor browser for iOS is free to use | Ars Technica Jan 09, 2017 Is Tor Really Anonymous and Secure? - How-To Geek Jul 12, 2017
Red Browser: Help/Support - gplexdb.com
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Jul 10, 2020 The best iPad apps for private browsers - appPicker May 16, 2020 Aloha Browser - private browser for mobiles: iPhone, iPad Private browser for iPhone, iPad and Android. Provides maximum privacy and security and comes with free unlimited VPN Tor Browser Review | PCMag