Watch-only wallet for ETH, BTC, LTC, perhaps others

Does anyone know of a watch-only wallet, either IOS or OSX, that can handle ETH, BTC, and perhaps others like LTC? It can be a regular wallet, but needs the ability to just maintain a watch-only addresses as well. I've found several that can do this for BTC, and I think there's a few that can do for ETH, but haven't found one that does multiple coins. Any thoughts?