Hello Effa1, during which process exactly does the Twint app crash? If you have problems with the Twint app directly, please contact Twint directly. Best regards, Remo

Hi Remo I haven't been able to start it since yesterday. Lights up briefly and disappears into nirvana. I've already deleted and reinstalled it, restarted the iphone. Nothing...

Hello Effa1, if you can't start the Twint app, please contact Twint directly. Unfortunately, we can't help you with this. Kind regards, Remo