The problem with these it's that they don't link every single address to a wallet, it only searches the blockchain for spend-linked addresses. Nor does it show ones in the mempool.
Linking addresses to the same wallet is something hard to do as normally one doesn't have information to be 100% sure that a set of apparently related addresses all belong to the same wallet (or owner). I don't think there's a tool like these that shows transactions in the mempool related to the address you're searching.
But all the transactions via that bitcoin addresses are in public ledger only right! We can see that through blockchain.info. If we just Google the bitcoin address we can find the relevant result in Google itself I think.