Is there a website where i can know about the current market of an idea?
I have an idea ( a gym networking app).
Find workout partners with similar interests so you can train and network at the same time.
I want to know whether this app will be a success or not.
How do I know that?
A quicker way to do this is to look for an analogue.
Finding workout partners may not be the pain but, something like motivation may be. Look for other companies that have executed on the idea and you know there is a market for it.
Keyword research man.
Talk to potential customers/users. Ideally in real life. Focus on problems, not solutions.
Looks like there are already some players.
https://play.google.com/store/apps/details?id=gymnut.droid&hl=en
Not a website, but I'm sure your local gym could give you answers.