If youre a Serious JEE Aspirant, I would suggest you not to fall into these EdTech Prep Apps. Choose a perfect preparation resource like a Proper Coaching or maybe Distance Learning/Online Classes from Allen, Nucleus or maybe Fiitjee or some Good Local Coaching Institute. Take Test Series of Allen and Rank Booster & DPP from Resonance. Ofcourse you may take classes for specific subjects in JEE, maybe in which youre weak from Platforms like Unacademy and try optimizing use of free to use resources across platforms like Vedantu and Byjus.

You may also check out Career360's Online Coaching for JEE. Do follow the link below

https://learn.careers360.com/