One reported issue is that the platform crosses with the instant messenger app, and it is known to cause problems. However, installing the app is worth the effort on the Nexus 9. Some have found that installing on the Nexus 9 is a challenge. Some have found that they struggle to get it on their smartphones or tablets, but here is an easy way to install it on the Google Nexus 9, iPad and Sony Xperia Z2 Tablet. Depending on the technology, the downloading process will vary. WhatsApp is a great messaging app, but downloading it is not the same on all devices.