I know hot wallet, cold wallet. But...in case i would use the hot wallet on an iPhone that has installed only the wallet and have internet connection...would it be possible to get hacked in a way if only that would be the use for it?
Yes — though if you use a smartphone solely for wallet purposes, the chances are lower, but definitely
not impossible. Smartphones can still have exploits even if you don't install random apps.
Which variant would be safer?
A hardware wallet.
Read -->
https://chainsec.io/wallets