Everything in one watch-only wallet ?

Hi everyone,

I’ve got some bitcoin there, ada here and other coins elsewhere, the thing is I can’t have (or can’t find) a watch-only wallet that can allow me to have everything in the same place.

It’s probably something technically impossible but I wonder If such an app or something else exist (didn’t find anything for now) Even if it’s something simple where I just input the amount of coins I possess and it calculate the price in USD based on the price of the coin.

Well, if you know something like that, feel free to share, thanks