What is best wallet for Ada

hi i looking for ada wallet on iPhone to restore my private key from original ada wallet

Which “original ADA wallet” did you have and when?

Do you have a seed phrase? Do your addresses already start with addr1?

Mobile apps are only available from yoroi-wallet.com and eternl.io. Alternatively, eternl.io, adalite.io, and nu.fi can be used in the browser.

But they all can only restore/import seed phrase wallets of the Shelley era (with addr1 addresses). If you have a much older wallet, you first have to create a new one and transfer your ADA to it with your old wallet app – probably Daedalus.