In FAQs it is written that:
Subscription fees of Rs 50/month for Coin will be applicable only if you buy direct mutual funds on Coin. Even the Rs. 50/month fees will be applicable only after the first Rs 25000 of direct mutual funds investments done on coin. You can track the value/worth of transaction executed on coin dashboard itself.
what if we transfer direct mutual funds from one demat account to zerodha,s account, we don’t purchase any mutual fund on coin and my investment is above Rs.25000, what will happen in this case, will I be charged Rs. 50 per month for the same