Depends. I use all kinds. Mostly Breadwallet and sometimes Coinbase for small amounts if I still have any left after buying. Breadwallet is nice since I can have an instant backup with the phrase in case I lose my phone. Pretty sure I'd be entirely locked out of coinbase for a while if I lost my phone. I'd use my computer, but I'm honestly to afraid I'd have some sort of malware on it. I should look into using a multisig wallet.