Minimums are simple: €1 for EUR transfers over SEPA, and $1 for USD transfers over ACH.
Maximums are not a fixed number that is the same for everyone. Your limit is worked out for your account from the information you gave during verification, so the only accurate figure is the one shown in the app.
How the maximum works:
What happens if you go over. Your transfer is not rejected and it is not lost. It is paused, and you are asked to provide proof of source of wealth within 24 hours. Supply it and the transfer continues. Miss the window and the transfer is returned to where it came from.
Because of this, do not try to stay under a limit by breaking one transfer into several smaller ones. It does not raise your limit, since the cap is on your total volume rather than on any single transfer, and it delays things.
If you are planning a large transfer, check your remaining room in the app first, and complete source of wealth verification in advance. That is what prevents a pause at the worst moment.