Board Thread:Questions and Answers/@comment-36126753-20180709005101/@comment-33173235-20180709010615

There shouldn't be any issue transfering to and from. I've done it myself in the past, however, it depends on what you run as a mobile device. If you're running apple IOS, then you would lose any stones saved by transfering to Blue stacks (since the program registers as an Android device) and vice versa. If you are running an android mobile device, then you shouldn't see any issues. You can also dump all your stones into a banner (cough* third ani. cough*), then transfer it over to blue stacks. I'm not 100% sure on gift box items and to be honest I haven't done it recently, so I'm not sure if the captcha system has changed things (I personally doubt it, as long as you use a transfer code). Just make sure you have the codes you need just in case something happens, so you can submit a ticket to dokkan support if necessary. I'd also try asking about this on gamefaqs and a few other forums just to make sure.

Good luck!