Yes. The ticket for public transport will also be in the DMEXCO app.
You will also receive your ticket separately from the regular DMEXCO ticket via e-mail. The transportation ticket only entitles you to travel to and from Koelnmesse (2nd class) on the extended network of the Rhine-Sieg Transport Authority (VRS) during the specified trade fair period.
This does not apply to Deutsche Bahn AG trains subject to surcharges, such as IC/EC or ICE. Only valid in conjunction with a valid photo ID and an admission ticket from Koelnmesse GmbH.