Hi everyone

I used the viber on my primary device which is the Android and I regularly backup my conversation and chat on the daily basis on to the google drive as per the apps. 

So I decided to join the viber on the secondary device which is Apple Ipad. 

It turns out that, when I open on the 2nd device, the group chat that I have is there, but none of the conversation doesn't sync it into my secondary device

is that mean that, if i use  viber and want to use the secondary device, is that mean it needs to be android-android, apple-apple

thanks for your help