FredCentralUS,
welcome to the Forum.
As a guess, I would say they are not inter-compatible, though I do not really know.
I look forward to finding out, as my next phone will NOT be an Apple, and the Mobile app works only in Android and Windows devices.
Someone will chime in and tell us for certain.

EDIT: Perhaps a PD Mobile forum would be a good idea. HP Envy Phoenix/4thGen i7-4770(4@3.4GHz~turbo>3.9)
Nvidia GTX 960(4GB)/16GB DDR3/
Canon Vixia HV30/HF-M40/HF-M41/HF-G20/Olympus E-PL5.
Tape capture using 6 VCR, TBC-1000, Elite BVP4+, Sony D8 camcorder with TBC.
https://www.facebook.com/BarryAFTT

When you export a project on PD Mobile, it states "Exporting a project will export the project file to the desktop mode of PowerDirector for further editing."

So it appears that they should be compatible.

Thanks for your reply,

Fred

Ps, I am using a Dell Pro 8 tablet with 8.1 OS & my PC is using 8.1 also.

By the way, I could not find a PD Mobile forum. Fred

I just saw this....it seems the answer to your question is yes.
HP Envy Phoenix/4thGen i7-4770(4@3.4GHz~turbo>3.9)
Nvidia GTX 960(4GB)/16GB DDR3/
Canon Vixia HV30/HF-M40/HF-M41/HF-G20/Olympus E-PL5.
Tape capture using 6 VCR, TBC-1000, Elite BVP4+, Sony D8 camcorder with TBC.
https://www.facebook.com/BarryAFTT

Got it to work, not sure what I was doing wrong, thank you for your assistance and suggestions, Fred

Barry, as I understand it, the mobile app will not work on Android phones yet. (I just looked for it again in Google Play.) I look forward to that changing, hopefully in the near future.

I have installed the Android version on my Tablet

https://play.google.com/store/apps/details?id=com.cyberlink.powerdirector.DRA140225_01&hl=en

Quite basic in comparison to the Windows mobile version and no export project option - only produce / upload to Facebook / upload to YouTube; but is does allow for basic 'on the go' editing

Hopefully features will improve as time passes; I think it it was only launched at the beginning of June?

A mobile forum would be great - given the differences in features probably would have to be separate Windows mobile and Android mobile?

EDIT

http://www.cyberlink.com/products/app-zone/appzone_en_GB.html?&r=1#position_c

There appears to be a 'bundle' version that may be free for registered users of Powerdirector - I have already paid for the upgrade on the free version but may be worth a try for others?

(upgrade was only £2.94 approx so not a huge amount!)
Director Suite 365
AMD FX-8320 3.50 GHz Eight-Core
Samsung SSD 850 EVO 250gb (OS)
Seagate 2TB SATA-III Hybrid 7200RPM Hard Drive (Data)
Toshiba 4TB SATA-III Hard drive (Archive)
24GB Memory
Nvidia GeForce GTX 650 2gb
Microsoft® Windows 10 (64-bit)