People use android wallet  without any complaints. And to be honest I haven't heard of any hack on android wallet and that is a sign that android wallet is not a bad choice  for storing your bitcoin.  But I must suggest that your seed phrase should be stored  offline and not on any device that is linked to the internet. As a newbie  i'v  had the initiative of storing my seed phrase on a device but not online device  probably a flash drive of hard disk drive but it also came to my understanding that these type of device could fail, and for a HDD a small magnetic radiation could wipe out all the information stored in it. And I'v also had flash drive that stopped working  all of a sudden without  any pre-notice. However android  wallet  are good  for storing your coin.