Mycelium Wallet is a mobile wallet. It only supports Bitcoin.
The biggest problem with mobile wallets is the hacking risk. It is in the category of hot wallets. Since it is from hot wallets (working with the internet), the risk of hacking is very high. Since it is an open source software, it can be developed by crypto currency users. Open source software is also risky. Because hackers can find vulnerabilities in software and use it maliciously against you. It will be a little complicated for beginners, but once you learn the system, you will do it very quickly. There is no desktop use. I have been using this wallet for about a year now and have not encountered any issues. As someone using this wallet, I strongly recommend that you back up your information.