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I use the IOTA wallet that's linked on the IOTA reddit on the right side of the screen if you scroll down.

IOTA is free to withdraw as far as I know (so is NEO, GAS and maybe a handful of others)
The IOTA wallet is cumbersome to use though. It is very important that you only use each receive address only once.
So each transaction of IOTA you receive in your private wallet, you need to create a new receive address for. Never re-use the same address. It's not secure a second time.