1. You have urls (http or https) in plain texts
2. You want to open them in browser apps

Then you can use RNHypertext in place of Text component from react-native. Or you should just use Text.

import RNHypertext from 'rn-hypertext'
import React from 'react'
import { View } from 'react-native'
export default class extends React.Component {
  render () {
    return <View><RNHypertext>this is my blog url https://www.zfanw.com/blog, you can open it now.</RNHypertext></View>
  }
}

You can customize link style with linkStyle prop:

<RNHypertext linkStyle={{
  color: 'red',
  fontSize: 20
}}>test</RNHypertext>