The app was first made live (for Android) on the 6th February 2017.
A major upgrade which included a lot more coins and some useful extra features was rolled out during mid August 2017.
(The app was originally created from October 2016 to December 2016 and Beta tested during January 2017)
The Check Your Change admin is Mr C H Perkins, publisher of numismatic publications in printed and eBook format. Author of "Collectors' Coins - Decimal Issues of the UK" and other books on British coins and related subjects.