The minimum requirement for Android is 4.1 unfortunately.... See here at the bottom of the page... Mobile software

Thanks Richard
Thats what I thought
is it possible to download a previous version from site ?

try this thread http://www.ez-robot.com/Community/Forum/Thread?threadId=7450

Only way to get a previous version is possibly from someone who is hoarding old copies of ARC....

Anyway to update your tablet to 4.1 or above?

or here is the page for the older releases
http://www.ez-robot.com/Community/Forum/threads.aspx?id=3

One problem with older releases is that you lose out on newer features and updates...

Minimum Android OS version is 4.0.3 and up - as noted on the Google Play Appstore: https://play.google.com/store/apps/details?id=com.ez_robot.ez_builder

If you are unable to install, perhaps contacting your device manufacturer for assistance. It appears some Samsung devices are having issues installing, where none of ours have that issue. It's nothing we can do on our end, sadly. It's a signing verification issue with Google Android and is affecting many products, not just ours.

Thanks all
wl contact manufacturer maybe it can be updated

Fingers crossed! In the meantime I will continue looking into a solution from my end.