on step 85. There is no pitches tab on the mobile app.

Sorry you're stuck but there's almost always a pretty easy fix! Do NOT try to start all over again, uninstall Max's Pitch Package, etc. That can make it worse. There's a 95% chance the same snag/fix is listed & answered in the Help FAQ. But if you can't find it there, post your problem here.
Make sure you post in the right category below & be sure to include a screencap showing the issue!
Are you sure you created the Pitch object? Try emailing me you username and pw at tim.hill@themaxlabsproject.com and I’ll check out your account.
You’re in a different place somehow. Not sure how you got there. Turn exiting the app and close it down so it’ll start over again when you reopen and try following those instructions again. Let me know, ok?
how it looks on my laptop