If u frequently check for credit score and actively applying for cc or loans u can take the subscription some apps are giving it for free but they will have ur data and they sell it to different vendors. So it's better to take a subscription if u get any promo code. u will also get instant notification if someone made a hard enquiry.
Yes, I took 1 year CIBIL subscription now, It is helpful only if you are applying more credit cards. I am applying credit card from june 2022 and planning to take four more credit cards in coming month.