title: is regex is allowed in android
body: <p>I need to use regex in one of my app ,even i had submitted my app to playstore which is using regex and I had seen one tutorial about regex from a well known tech youtuber and founder of Learn Code Online and he said that regex is not allowed in android app and if the android app devloper should know about these then they will reject your app or removed.</p>
  
  <p>I had already pushed my app updated to play store.</p>
  
  <p><a href="https://www.youtube.com/watch?v=ykSuHWhh5hc&amp;list=PLRAV69dS1uWTy-hzDNUrq3_mGjvm3ilQK&amp;index=1" rel="nofollow noreferrer">HERE</a> is the link of its video at 11:00. Please tell me whether it's  allowed or not.</p>