The Mycelium cryptocurrency wallet is one of the oldest and most popular Bitcoin wallets available exclusively for mobile platforms, having first been released in 2013 as an Android app before later being ported to iOS as well.
Mycelium describes itself as the “default Bitcoin wallet” and while its claims to the title of most well-rated cryptocurrency wallet on the Play Store isn’t really accurate anymore, the app does have several noteworthy features.
For starters, Mycelium is entirely open source, which is one of the most essential features for any good cryptocurrency wallet. The app also relies on the Simplified Payment Verification (SPV) technique, which allows it to confirm transactions without having to download the entire blockchain.
Since mobile devices are insecure in some regards and more prone to theft, the developers of Mycelium have implemented a handful of features to improve the security profile of the app, without overly complicating the interface.
Source:
https://www.techradar.com/reviews/mycelium-cryptocurrency-wallet