Which mobile platform is cheaper to develop on?

Question

Mobile development

Hello everyone) I want to order a relatively simple mobile application. For internal company use. Which platform is cheaper to develop: android, ios or windows phone?
The web is not suitable for mobile, because you need to use the history of phone calls and export numbers to the application

Answer 1

Everywhere it will be "expensive" - ​​now the hype on mobile development
"Cheaper" will be to make a website for mobile
PS: Windophone can suddenly give up and no one will pick it up

Answer 2

I suspect that "legally" (without hacks, etc.) your functionality can only be implemented in android. As far as I know, there is no public API in iOS and WP for accessing call history

Answer 3

on Unity3D and further - export to the desired one.

Answer 4

If for internal use in the campaign - Windows Phone. There are inexpensive devices, and the OS on weak devices with similar characteristics is more stable than android.

Answer 5

I agree with abcyu , the best option is the web. You won’t be switching everyone to iOS, Android or, God forbid, Windows Phone.