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.
When it comes to wallet, security is of higher importance than space, you have the wrong notion that it's safe we have seen so many hacking on web wallet, especially the domain redirection, mobile wallet is more safer as long as the owner how to secure his phone and put verification and password protected, but on top of this education is still the key in managing the wallet well.