Jaxx is insecure? I've heard about it a lot but never actually used it, although this is the first time I've heard it's insecure. Anyway, since android phones run apps in a VM a mobile wallet on an android phone is the most secure type of wallet short of a cold wallet (if you use IPhone then I can't really help you there). Mycelum, Coinomi, or Electrum are 3 good wallets to consider; although if you're worried most about hacking then Coinbase or Blockchain.info would be best because they support 2FA.