If you want to open Whatsapp on iOS, you can use the open link block found in the control section that works like the activity starter (and I think is even easier to use). If you know the correct links on Android, then they should be the same on iOS
If you want to open Whatsapp on iOS, you can use the open link block found in the control section that works like the activity starter (and I think is even easier to use). If you know the correct links on Android, then they should be the same on iOS