Startup Idea: Store Specific Grocery Shopping Route Optimization App

Startup idea to develop a store-specific, intuitive app to optimize grocery shopping. The app enables users to enter their shopping list, then organizes it by the fastest route through the store, possibly providing in-app navigation. Additional features may include in-app ads for nearby products and promotions enhancing store's marketing efforts.

My problem is that grocery shopping takes too long and I often walk back and forth through the grocery store. I don't want someone else to shop for me, especially when it comes to produce, I like to pick out my own groceries.

What would be helpful, is a store specific app, that would allow me to enter a grocery list, it would organize my list by the fastest route through the grocery store, and perhaps even guide me with a map.

Could potentially monetize by showing ads for nearby products or promotions that the grocery store is trying to push.

Some of the grocery stores I shop at (Harris Teeter or Publix) have apps, but they do not speed up my shopping trips while allowing me to continue doing the shopping myself.