To install eWallet for Android, just search the Google Play (formerly Android Market) application for "eWallet", then purchase and install the app onto your phone. 

If you have already purchased eWallet for Android and are re-downloading, be sure to use the same market log-in you used for your initial purchase.

You must have eWallet 7.2 or newer installed on your Windows PC to sync data to an Android device using USB Mass Storage.  To use Wi-Fi sync with the Android eWallet you must have eWallet 7.4 installed on your Windows PC.

You can find out about the latest Windows PC version of eWallet here: 

eWallet Upgrade Information