No it's not, if someone gives you a free car and you have to pay for gas and oil it's still a free car. You have the option of not putting any gas or oil in it just as you have the option of not doing in app purchases. The app, and car, are still free.
Let me make a better example.
A Restaurant puts adverts in the local papers, and social media, We give away free food & Drink, and in their window they have BIG neon signs saying come in, free food & Drink here.
Everyone goes in and yes indeed, they are giving away free food.
Boiled white rice & water
All around the place inside are steaming piles of beautiful currys and other tempting foods.
They keep coming up to you wish price lists, telling you how amazing the food is that can go with your rice, also the wide range of amazing drinks.
The prices are low, for a little of this other amazing food, it smells great and looks great, and they keep guiding you over to see it.
Yes, they are giving everyone free food and drink.
But would this be really false advertising?
Everyone knows full well it's a cheap marketing gimmick to draw people to the store under the impression they are giving away more than just white rice and water.
I don't think such a food place should be able to run marketing campaigns saying come to out new place for all the free food and drink you want.
It's deliberately misleading. they know it, and we all know it.
Others here are saying it's fine, as they are doing what they promise in the adverts.
I just disagree.