If you're looking for a good mobile wallet to use, I personally love using breadwallet. The main selling point for me is that it is able to connect directly to the blockchain and can see in real time how many peers are confirming your transactions and when exactly if it's confirmed.  If you think that a transaction has been lost, you can always rescan the blockchain on their, which makes me feel a little bit more secure when transacting money around.  Plus it allows finger print scanning to quickly access your wallet, which is always a plus too.