Epic released Unreal Engine 4 with $ 19 subscription source

Most recently, I received an email from Epic telling me that they make
Unreal Engine 4 available to everyone by subscribing for $ 19 per month for development on PC, Mac, iOS, and Android, with the condition that they pay 5% of the sales amount.
And most importantly, C ++ sources are available that will be
distributed through github (although you can also use the binary version).

Also promise:

• the ability to end the subscription at any time and continue to use the engine without updates
• support for Mac OS X and Xcode (but they write that while it is a bit from the ideal like Android).
• built-in App Store for selling content and extensions

The site has a warning that this is an early release that has not yet been finalized
and that if you are looking for a product that is truly ready for commercial development, then this should be expected in about six months.

(other license terms and platforms are available on special conditions) in

more detail you can read the link:
unrealengine.com