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?
The use of hot wallets will also be safe if the key or seed phrase consisting of 12-24 words stored in offline storage. CMIIW.
AFAIK, if you use a mobile device like an iPhone and only a wallet application is installed without any other applications because your iPhone specializes for a wallet, I think it can provide good security even though the wallet hack can occur beyond your expectations and at any time.
I mean in terms of safety, cold wallet is safer than the use of hot wallets.