Which health insurance and covers you have?

Which health insurance would you suggest, I started looking from acko but found a mandatory health tests before applying. Suggest some good sources to buy health insurance without hassles. so i am looking for cover of me, my mom and sister. Is there a way to get my sister covered or will I have to get one for her separately, all inputs are welcomed, please share your good and bad experiences with all insurance covers and premiums you avail