CoinCorner is a custodial cryptocurency service that enables its users to store Bitcoin and some other cryptocurencies. It is more of an Exchange service than a wallet in my opinion. Funds deposited by its customers are held in cold storage under CoinCorner control.
When it comes to security this "wallet" is not my favorite as it does not give users access to their private keys but it provides an easy interface to buy, sell, Exchange, send and receive crypto. Its main market is Europe because the supported fiat currencies are GBP and EURO. Overall the wallet is okay, my major turn off was the long for I had to fill during signup, but CoinCorner is worth trying if it suits your needs.