The mobile application gives quick, searchable, access to information on substances prohibited in competition.
More than 2,000 people have downloaded the free iPhone app since its launch at the start of November.
A version for Blackberry smartphones is expected at the end of the year.
A FEI spokesperson said: “It’s free because we want as many people as possible to have access to this useful information.”
The Android version is available on Android phones with a 2.2 (or later) operating system from the Google Android Market, at www.fei.org/media/smartphones-apps.
The iPhone app is available from the iTunes Store.
The app accesses the FEI equine prohibited substances database, which has been available on the FEI website since April.
When a searchable term is entered, a short definition of the substance appears, accompanied by its FEI classification and common trade names.
A feedback function with automatic email acknowledgement allows further advice and clarification.
The database will be updated to incorporate new substances. See www.fei.org