Hi Alex,
I tried opening the TrainerDay app this morning and it crashed immediately i.e. isn’t opening. I’m seeing the same behaviour on my wife’s iPad.
We’ve tried the obvious, restarting our devices etc. but the app continues to crash as it tries to open.
I can see that there was a software update this morning (UK time), so I’d imagine that there’s a problem with the update…
Happy to provide any further info you need to investigatre this, but seeing the issue on an iPad with up to date software and an iPhone 15, again with up to date iOS.