Each pod can be connected to multiple mobile device, just install the Sensibo app and scan the pod's QR code (just like in the initial installation).
That's the best way to make sure all devices are synced - if you open the app and view each pod's data from different devices, you should see the same stats.
If you use the app but other users use the remote, we cannot always* reflect what's been done with the remote in the app at the moment (the app and the remote send a "bundle" of commands to the AC, they don't just change one parameter like temperature or fan speed). So the data you'll see in the app will not reflect last actions done via the remote.
* We've added a beta feature to sync the AC in the app with its state when using the remote, read more here