If you use a desktop client, make sure you understand how to harden agaisnt malware. Desktop OSes don't have app sandboxing, enforced code signatures, or hardware encrypted key storage like iOS devices or dedicated hardware wallets.
So it means Ios wallets are better ?
iOS devices are secure-by-default, so they are better for people who do not have strong computer security knowledge. This is why we chose iOS as the first platform for breadwallet.