Aplin was the SANFL umpires' coach between 1955 and 1957 and umpired in the South Australian Amateur Football League (SAAFL).
After retiring as an umpire, he was a football commentator on Adelaide radio for 18 years, and also a television football panellist.
Aplin was inducted in the Australian Football Hall of Fame in 1996.
- Ross, John (1999). The Australian Football Hall of Fame. Australia: HarperCollinsPublishers. p. 140. ISBN 0-7322-6426-X.
- Australian Football Hall of Fame
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