Cryptonator is one of the most popular multi-currency wallet, which supports 16 crypto and 4 fiat currencies. Apart from its desktop version it has Android and IOS apps.
The wallet provides two-factor authentication with confirmation by e-mail or by phone, it is assumed that there is a strong password. According to users' feedbacks, there were many cases when the transaction was confirmed, but the money was not transferred on the recipient's account. Technical support does not solve these problems. So it makes sense to talk about imperfect protection, where, perhaps, the human factor plays greater role than technical flaws.