My project consists of 2 pillars.
1st is that i want to develop an android/ios app that does only one thing, but needs to do it well and fast. It needs to send notification to my subscribers with a text that i write . The text is only a few words an only contains text (letters), no images. The key is that i want ALL my customers from all over the world to receive this notification and read my text the moment i send it. 10 seconds later is a failure.
2nd is that i want aw many customers (subscribers) possible. The app is free to download but my customers pay a membership to be able to read the text i send to them.