Hi Komal,

To attempt JEE Main mock test in Hindi I will not recommend any third party app as NTA(National Testing Agency) itself has a mock test section on its official website for free.

Website Link - https://nta.ac.in/Quiz

Just copy this link, and paste it in your browser. Then select JEE Main exam and any relevant shift. Then LOGIN using the sample login menu, read instructions and start the mock test.

Refer here for more info - https://engineering.careers360.com/articles/jee-main-mock-test

Have look at the JEE Main Knockout program - https://learn.careers360.com/knockoutfull-jee-main-april/

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!