Don't use unknown third party wallets for Monero. You may lose all your funds there if they're scammer. Get a ledger nano s and they have monero wallet inside. Physical wallet is very safe if you have too much monero.
I understand the mistrust. Kind of. But It's open source and you can put a small amount on it...
But as to the Nano S... I own one.
There is no Monero wallet for it yet.