I would also recommend you do not store large amounts of EOS tokens/CryptoCurrencies on any mobile application and large amounts should be stored in a safe location using a cold wallet (or other safe crypto asset storage solution).
You should always consider the following: "Would I keep $200 or $20,000 of FIAT ($cash) in my real-world wallet?" You should assume these CryptoCurrency/EOS wallets the same.
The top priority this project is to keep the private keys secure and safe, you're private key will never leave your device when signing/processing a transaction.
Looking forward to see the communities feedback on this project.