Hi all,
We have received some reports of players not being able to add negative flight numbers to their discs from the mobile app on various Android devices. The UDisc team is investigating this issue and actively working on a fix, and we will keep you posted on any major updates!
As a temporary workaround in the meantime, you can use the “Notes” field, directly underneath the flight numbers, to type in the minus sign (-) and then copy/paste the negative value into the flight number field.
We appreciate your communicativeness and attention to this matter!