App not compatible with phone

any body figure a work around for this ...i just purchased and now found out that i cant download the app...i guess i have version 8 for android...i think this not cool that the ring web site says nothing about this and should really have the requirements listed...cause im not about to purchase another phone for this to work...wth...so qustion is can i use another version of the app....i read that vesion 3.49 works with older andriods....???