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At this moment the Galaxy Note 4 is not a compatible device and as such there might be issues with the app. The developer team is aware of the need to add new devices to the list of compatible devices. There are some users who can synchronize with non-compatible devices. If your phone meets the requirement of Minimum Supported OS (Android 4.4 KitKat), it might work without any issues.
In case it didn't, you can try these troubleshooting steps. Some users of incompatible phones have found them useful.
Note that we don't guarantee that the synchronization would be will be successful as we are still testing on this phone model.
You might see a Note 4.0 on the compatibility list, but this refers to a tablet and not to the phone.
Let me know if you have any further questions.
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