Is PlayerPrefs efficient for mobile devices?

I want to develop my application for mobile but I am not sure if playerPrefs is the most efficient method in terms of both memory and game performance.

I quickly estimated and it looks like I may need in the range of 250-300 playerPref keys in the entirety of the game (which will be mostly running in the main scene).

Will this many playerPrefs bog down my performance and is there a more efficient method or should i have nothing to worry about?

Check this article by PreviewLabs Writing PlayerPrefs, Fast - PreviewLabs

I also develop for IOS and am working on a resource management game. I use PP for almost all my variables that I want persisted, I haven’t seen any performance decreases caused by PP’s.