Apple handheld devices do not offer native Flash support. Certain Electude lessons identified as "obsolete" as well as certain customer self-made content may contain Flash for animations, which will present problems on mobile devices.

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There are alternative browsers available to help users overcome this problem. Unfortunately the latter of these two is not free of charge, underneath you will find downloadable links to these browsers:

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Puffin browser 
Photon browser

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As of March 2019 all Electude lessons found in Electude pre-defined courses use HTML5 animations (Flash free), and have no limitations on iOS and other mobile devices.