This has also become a problem for me since - though I’ve only noticed it since the latest update. I’ve been configuring a device to use as a back-up while travelling, and cannot open the app on both devices without being asked to reauthenticate by email. I had previously been able to do this with one iPhone and one Android device (and I think sometime back an iPad as well), but in this case, both devices are iPhones.
While I understand this does make my account safer, both devices are locked by passcode and Touch ID, and I feel I ought to be able to choose to keep them both active. Is this a deliberate feature or is a solution likely to be developed that will make multi-device usage possible?
This is quite annoying.
With Revolut, I type a 4 digit pin to get into the app on whatever device.
With Monzo I either have no app security or I have a complicated email confirmation process, depending on whether I used my work or personal phone last time.
I would be happier to use Monzo as my main current account if there was always the same ‘friendly’ security (i.e. pin or biometrics) on all my devices.