Review on Ray Wenderlich by Ryan Koser

It's free to use, has great tutorials that teach you how things work in iOS programming from scratch! I've been using it since 2011 when i first got my iPhone 3G (my only phone at this time) so most of these lessons are very familiar with me now but they're still easy enought o follow along even if some concepts have changed slightly over those years. Some parts aren't updated as often which makes them hard or impossible t learn certain stuff sometimes without having other resources online like Stack Overflow/Reddit etc.. This is one resource where we can always find answers related our questions within minutes instead waiting hours just looking around forums searching google trying different ways before finding something useful!! Learning all about Core Data was really difficult until learning through ray wendlerich tutorial made everything clear because he explains well what each piece does and why there should be used together rather than separately.