My favorite mobile app at the moment is the Tap app . The app has a cold storage wallet that makes sure your crypto assets are always safe. It also allows you to view your portfolio and trade at the touch of a button, whenever and wherever you may be, which I find very convenient, especially as I travel a lot. Lastly, it allows me to convert my crypto for fiat, ensuring instant liquidity, so I can spend my crypto on anything I want without any hassle at all.