I have about 30-40 projects in my Zoho Projects account. Just signed up for the iphone app and paid the $30. Allocated the license to my username but I cannot see the more recent projects I have added. Just so you can test this my username is
adrian@easywebrecruitment.com and I have just added a project called Test Project.
It does not display in the iphone app and I wonder if this is because there is a limit on the number of live projects?