Been testing and it looks great.

One suggestion, not sure whether I might have missed something or maybe I'm still to new at this.

When clicking on 'Receive' one have the option to enter an amount with the 'Optional Amount'. When I select this I see that the amount is entered in bitcoin. Would it be possible to maybe be able to change this to enter an amount in say fiat i.e. USD?

I think this might make it easier as often a transaction is based on a fiat value which one then first have to convert to bitcoin before one can enter it here. Would be much faster if I could just enter say USD 200 and have the QR generated with the relevant bitcoin value.

Hope above makes sense. Other than that looks great.