Is Atomic Wallet free?

I've been hearing a lot about Atomic Wallet, and I'm considering giving it a try. But before I do, I'd like to know: is Atomic Wallet free? I mean, are there any hidden costs or fees that I should be aware of? I've had bad experiences with some wallets that claim to be free but then charge you for various services later on. So, I'm just being cautious here. Could you please clarify if Atomic Wallet is indeed free to use, and if there are any catches I should look out for?