Then these calls STILL wouldn't be free, except when you're on public WiFi or other WiFi service. And if I were a business offering public WiFi, I might very well disable the feature allowing people to call via WiFi otherwise I might find that I'd be eating the cost of my visitors making calls to distance places, possibly of great length. Or streaming videos. (I can easily picture someone at a boring sporting event for several hours making a long call to a friend or relative overseas if they knew the call was free.)
No.
Generally, if you have Wi-Fi at home, a business, etc. data is considered included.
These apps really are free, and there is no reason not to take advantage of them when you can.
The calling apps generally require you to earn credits by watching short ads.
Most calls are about 1 credit a minute, texts are half that.
International calls cost more credits, as do multi-media messages.
None of these should have any bearing on your internet bill.
Generally, internet via Wi-Fi is considered unlimited as to the amount of data used each month.
The only thing you could notice would be a slowdown in the service, and you would need quite a few devices doing some heavy data useage to really slow it down to where you would notice it- so long as everything on your end is functioning as it should.
How do you think that hotels, hospitals, libraries, etc. would cope if it were as you are saying?
There are dozens of people connected to these Wi-Fi systems all at once, and usually it happens flawlessly. or close to it.
At home there are my three phones, my step mother's phone, her laptop, her computer, the television, my sister's phone (she just moved out a few months ago), and these are all constantly connected to the same Wi-Fi.
On one of my devices, I can use around 70 GB of data in a month.
Another 50 GB to 70 GB for another, and about 30 GB for the third.
And that is just me.
God only knows how much the others are using.
Where I live the standard home internet plan includes 1 TeraByte of data, which is pretty immense.
For an additional $50, it is actually unlimited.
And regardless as to where you are calling, the data use of calling apps is remarkably low.
Much lower than you would believe.