The idea for the app may be good, but how it will look in practical operation. One app will not eliminate all fake news. All authors and agencies from around the world would have to take part in it. In addition, all media race in the news publication and do not want to wait for verification or acceptance. Undoubtedly, the fight against fake news is needed, and this can be a beginning.
We can't really hide in ourself that there are many people that are created fake news just to get what they want, just like what happened in cryptocurrency market that there are people that are creating speculation to destruct the image of crypto so people will get panic and sell their coins in very low price.