Control Led Bulb using node mcu using mit app inventor from things speak server

Hi , my name is Alen .
I am developing a product which could control the brightness of bulb . This is possible using node mcu via mit app inventor app .
I need to build 1000 products (ie includes 1000 node mcu ) using a SINGLE app .
So can i use the things speak server for this . Below is the youtube link . Is this possible since when i connect my node mcu with my phone it shows "Connect without internet " and i do not know how to solve this little bit . From the video , the things speak acts as a server where i would get a unique link for which i could as a ip address .
It would be kind if you could help me with this .