On IOS it is about five. I think on android it is just one. I have tried otherwise (S6 phone + T705 tablet) but it didn't work; it said it is already installed. Obviously one can get around this with rooting it and using Titanium Backup (etc) to do a backup+restore, but don't some apps check via the internet how many installs were done? I need to clone a S6 to S7, but keep the S6 as a backup.