First time I hear about Tangem.

https://tangem.com/apps/ looks like a companion app  which would not be reviewed by us but in the case of Ballet I made an exception as the private keys are handled by that "companion" app but in the case of tangem ... as the card has no display it can only blindly sign and surrender data it's been asked to do, so while it might not surrender the private keys, the "wallet" might empty the full account while the user thinks to be paying a coffee. Not funny. Not sure how to add it to walletscrutiny.