About one dollar each
Every app varies in cost, from free, to $1, to $20 or more.
$50,000 to $150,000 would be how much an app like Practo costs.
FREE!!
free
Once you buy an app, you can use it as much as you want.
This question needs more information.
1 dollar
No it does not cost money unless you buy an app that costs money. If it does cost money you only have to pay for it the one time you get it from the app store.
depending on your app, some are free though
$99/yr for Itunes
£17.95 from their website.
It is free to update the app.