How to set up Google Assistant on iOS or Android so it responds to 'OK Google'

"OK Google" is a phrase you can say to turn on and use Google Assistant, but you'll need to enable Voice Match first.
Indiatimes

Perplexity AI voice assistant launches on iPhone; here's how to use it

Perplexity AI has launched its voice-activated Perplexity Assistant on iPhones, enhancing user convenience by managing media, schedules, and emails. Unlike Siri or Google Gemini, it integrates deeply ...
Hosted on MSN

Apple Update: Apple's Siri will change! iPhone users may get the option to set ChatGPT or Gemini as the default assistant..

There is some big news for Apple's iPhone users. Soon, they may get the option to set ChatGPT or Gemini as their default assistant instead of Siri. This change can bring a new and exciting feature for ...
TechCrunch

Forget Siri. Turn your iPhone’s ‘Action Button’ into a ChatGPT voice assistant instead

With news that OpenAI’s ChatGPT Voice feature is now available to all free users, you can ditch Siri as your main voice assistant on your iPhone — well, specifically on your iPhone 15 Pro and Pro Max, ...