OmegaStarScream already mentioned about Bluewallet this wallet enough for a Android user but if you want to store and hold a big amount of bitcoin then i will recommend you to use Electrum wallet. because this wallet is consider as a high potential and trusted wallet for both Android and Pc users. so you can keep Electrum as a first choice and Bluewallet & others wallet as a next choice. now you can choice yourself according to your needed