I already checked questions as:
...but what I'm asking regards popular wallets as BitPay and Electrum, that have both the desktop and mobile app, permitting to export and import a wallet. Nothing that takes into account messing with any
I'm currently doing this with a BitPay wallet, and it seems it works good. When a transaction occurs (i.e. I receive funds) this is notified on both platforms (I think it's related to how those wallets works; I'm referring to the Bitcore Wallet Service).
I also read about the notorious quote "not a good idea", but I'm not sure of this refers to different type of wallets or what else...
Any clarification on this is more than welcome.