This is an outstanding tool with a clear and easy to understand UI, which translates into a great UX.  Even though I haven't had too many opportunities to explore TransferChain in depth yet, I can see that they take security very seriously.
What business does not need this service in today's world?
Also, they are very responsive, which is essential.  They have passion for their project, and that guarantees the future of this useful tool.
Trust me, this is a real GEM, I am very rigorous when deciding whether to buy or not on AppSumo.
Do yourself a favor and buy TransferChain without any hesitation, and I guarantee you that you won't have any disappointment.
 Buy it before it is too late, and this great opportunity is over. I do not want to see you crying later :-)