Nice find. Also there doesn't seem to be any source code available for this wallet, so I wouldn't touch this wallet with a ten foot pole.
It's closed-source/propitiatory wallet and it's shown by the fact it have built-in exchange.
Trezor also has an in-built exchange yet is fully open source, so having an in-built exchange does not necessitate being closed source
But yes, I suppose the lines between being a wallet / being an exchange app are getting blurred in this case, especially with the use case of exchanging USDT for BTC in the background to allow for a cleaner user experience (ie. replacing the BTC mining fee with an USDT mining fee on the surface).