Health insurance works differently than term insurance.
Health insurance premium is different for different ages, your premium for age 30 will be different then age 35. Also anyone entering at age 35 will pay same premium as the one who is a subscriber since long.
Premium lock means you'll continue to pay latest premium applicable to your entry age as long as you don't make a claim.
The price will rise based on age brackets, such as 26-30, then 31-35, and so forth, even if there is an age lock feature.
They will justify the increase by citing medical inflation and general inflation.
There won't be a significant difference between others and Niva with the age lock feature.
That's why I mentioned it can be somewhat misleading.
Otherwise, if someone purchases a policy at 25 and maintains it without any claims until they reach 50 or 60, do you really think Niva will only raise it according to inflation? If that were the case, they wouldn't be able to sustain their business.
And let's conclude this here, I'm not gonna argue over this, this is not the Only feature people consider, so even without this feature,there are many other major factors to check before purchasing.