Open phoneswappr on your iOS device
Select sync contacts
Then select send to cloud.
Once your contacts have been synced to the cloud, you will be giving a 6-digit pin. Copy / print screen the pin.
Open Phoneswappr on your windows 8 phone.
Select sync contacts, then select get from cloud.
Enter your 6-digit pin.
Congratulations your contacts are now available on your Windows 8.