Hello student Allen Institute is a third party portal and we don't have enough information to share whether it offers online/offline classes or not.

But Careers360 offers you a knockout package full of knowledge easily explained by top faculty just to qualify entrance examination in first attempt.

Refer to the link mentioned below -

Jee main - https://learn.careers360.com/knockout-jee-main-april/

Neet - https://learn.careers360.com/knockout-neet-may/

Feel free to comment if you have any doubt

Good luck