There are dozens of web - based services offering «free» app creation, often supplemented with premium - priced assistance for more complex apps. (thefutureofpublishing.com)
That's why only by rooting you can apply other complex procedures, like flashing custom ROMs firmware, or installing complex apps. (android.gs)
Now you can look forward in installing custom ROMs on your device along with other complex apps that requires root access in order to run properly. (android.gs)