The Free Trial is defined only for Institute which gives unrestricted access to all the tests on Testkatta and also you can create your own test and can practice for a duration of 15 days.
The basic package provides you unrestricted access to all the package tests which provides instant evaluation of your performance. Here you can attempt package tests multiple times. It also provides National Ranking of your performance which increases competitiveness. Click here to download Basic Package Test Schedule.

In Complete package, you will be charged Rs.1000 (including service tax) per exam per subject and your account will be valid till exam date of selected year. Here you can create unlimited tests and can solve Special Tests prepared by Expert Teachers which provides All India Ranking.
If you select Physics, Chemistry subject for JEE and NEET exams, charges will be considered only once. For example, if you select Physics or Chemistry for both JEE and NEET exams, you will be charged Rs. 1000 only.

Yes, you can upgrade from your Basic package to Complete Package. Get exclusive discount while upgrading.