coins.ph is not a bitcoin wallet, it is more like a bitcoin account. it has some features of a wallet obviously, such a letting you send and receive bitcoin. but you have been doing it through a third party. it is something like Coinbase!
if you want a bitcoin wallet then use a bitcoin wallet.
if you want the benefits of a full verifying node then install bitcoin core.
if you can't and want a light (SPV) wallet then choose Electrum.
for cold storage you can use bitaddress.org for creating paper wallets
and for hardware wallets you can use Trezor.
read this for more information:
https://bt.irlbtc.com/view/1631151.0