Car runs fine then stalls. It starts up right away but may stall again. 94000 mi

Does it stall while at highway speeds and while driving down the road or is the stall at lights and stop signs? Do you have a complete power loss at this time such as : no power brakes or power steering and accessories shut off till vehicle is restarted?

It will get worse with time, eventually it will shut down and not start for hours and then just start right up, try changing your crank sensor