What does Red Circle look like on Samsung?

On Samsung it is the design shipped in One UI 8.5, shown above at full size. Older revisions are listed beneath it.

When did Samsung add Red Circle?

Samsung first drew Red Circle in Touchwiz 2.0, released April 26, 2013.

Samsung Electronics has shipped 26 versions of Red Circle. Each is dated, so you can see when the design changed.

Samsung Touchwiz 7.0

Samsung shipped a new design for Red Circle in Touchwiz 7.0, released August 18, 2016. The previous design is shown beside it.

✳ marks a release that redrew this emoji. The rest re-shipped the design unchanged.

What does Red Circle look like on Samsung?: On Samsung it is the design shipped in One UI 8.5, shown above at full size. Older revisions are listed beneath it.
When did Samsung add Red Circle?: Samsung first drew Red Circle in Touchwiz 2.0, released April 26, 2013.
How many times has Samsung redrawn Red Circle?: Samsung Electronics has shipped 26 versions of Red Circle. Each is dated, so you can see when the design changed.