Use this application, you can transfer string to Circled or Upside Down. (For example, convert A to Ⓐ or ∀) And you can even say the sentence to convert.
It is real time transfer. You can press delete key to delete all the sentence. Or press hide keyboard to hide it.
You can copy to converted string by click the converted string. And you can click share icon, and share the converted string to your friends.
Click the output string, it will copy automatically, you can paste it to anywhere.
Number is supported (⓪~⑨), Symbol is supported (¿⅋؛)
Part of Chinese & Japanese & Korean is also supported, like ㊀~㊈, ㊤㊥㊦, ㋐㋑㋒, ㉠㉡㉣

p.s. Internet is needed if you want to use voice recognition, otherwise internet is not needed.