When we launched Zoho Projects 4.0 the Free Mobile edition did have limited options to use while the rest of the features like tasks, documents and timesheet were available only as part of the paid edition.

Now Zoho Projects Mobile App is Free - e

ven the more advanced version that was previously only for paying customers. We want you to start using the Zoho Projects Mobile App to the fullest extent possible for your work even while on the go. 

So go to
 iTunes or Google Play store install the Zoho Projects Mobile App right on your mobile. Try it and let us know your views.