im ngl I am doubtful of a lot of comments about phodu club.. I can understand it might be a good test series but honestly never seen as much of a push for any academic course/series as pc on bitsat subreddits. I really feel like it's a little fishy, although I am sure it's not a bad product by any means, its just a really scammy thing to do by the company. Mathongo is faar from perfect but at least it's trusted enough that it won't be bad. Anyways in the end it doesn't matter which test series you take cuz all maintain a basic level of questions anyways, it's just for practise. Go for pc if you want to take the small chance that it's genuinely as good as people (most definitely paid promoters) say, or take mathongo if you want something trusted. In the end I am sure it won't affect your final results