guarda wallet can be used in different types of operating systems. For example, the desktop version is provided for linux, windows, macOS, and more interestingly, an extension for google chrome browser is also provided.
The feature of this online wallet is that the wallet is completely decentralized and we are not worried that the guarda company will take our money for itself because it does not actually have access to our private keys.
I found this wallet can also be synced with the ledger nano s hardware wallet and all the ledger nano s information can be viewed in it. In fact, two of the safest wallets, one online, one cold. Of course, due to the non-custodial nature of this wallet, I think it has the same security as hardware wallets.