What does リピートボタン look like on HTC?

On HTC it is the design shipped in Sense 8, shown above at full size. Older revisions are listed beneath it.

When did HTC add リピートボタン?

HTC first drew リピートボタン in Sense 7, released 2015年3月30日.

HTC Corporation has shipped 2 versions of リピートボタン. Each is dated, so you can see when the design changed.

HTC Sense 7

HTC shipped a new design for リピートボタン in Sense 7, released 2015年3月30日. The previous design is shown beside it.

The first HTC release we hold for this emoji.

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

What does リピートボタン look like on HTC?: On HTC it is the design shipped in Sense 8, shown above at full size. Older revisions are listed beneath it.
When did HTC add リピートボタン?: HTC first drew リピートボタン in Sense 7, released 2015年3月30日.
How many times has HTC redrawn リピートボタン?: HTC Corporation has shipped 2 versions of リピートボタン. Each is dated, so you can see when the design changed.