A web wallet is one such wallet. You do not need to use any additional applications to save it. It is much safer. In my opinion, web wallet is much better than mobile wallet. Using it does not require a separate space. Hopefully the wallet will expand further in the future.
I think both web wallet and mobile wallets can be hacked and not safe for any unathorized access because there are no such perfect technology when it comes to security, that is why no system is safe for great hackers who can easily steal your information and funds. But I suggest mobile wallet is more accessible than web wallet because using applications is much convenient than opening your browsers to access your wallet.