You will receive your shares in the BUX Zero app when you meet all the criteria of the campaign. This includes a.o.:
Signing up to the BUX Zero waiting list;
Creating an account in the BUX Zero app when it launches;
Funding your account in the BUX Zero app;
Having a balance of at least €1 on your BUX Zero account three months after opening and funding the account;
Having executed at least 3 trades within the first three months after opening and funding the account.
This means you can receive the shares, at its earliest, three months after opening your BUX Zero account, as this is the first possible moment to meet the final requirement.