I am not aware of a limit to the number of flights. I suggest you hold this question over till we release a future update which has more comprehensive flight search/sort/favorites facilities.
But you have created this product, isn’t that correct? So why can you not answer this question? This is a relative easy fact that the creator of the program would know. And you are the creator.
So is their no way you can find out the answer to this question? Because it must be known in your company, it can not be any different.
And I would still like to know how much flights Navigraph memorizes, because otherwise I have to find an other way to track my flights.