The hard fork in block 1920000 created two networks: The forked chain (here referred to as ETH) and the classic chain (here referred to as ETC). If you had ether in an account before the hard fork, you now have this amount on both chains. If you transfer 10 ETH from account A to account B, then this same transaction can (usually) be replayed on the other chain as well, and will there move 10 ETC from account A to account B. You might not want that!
This DAPP provides a simple interface to create a replay-safe transaction. It is a single transaction which is valid on both chains, but has different effects on each one. This allows you to move your ETH from account A to account B and - at the same time - your ETC from account A to account C. The DAPP charges 1 % on the ETC side for this service. So you will receive 100 % of your ETH and 99 % of your ETC.
Crafted with by Vik.