The cost of developing a grocery delivery app like Instacart depends on various factors such as the features, platform, location, and complexity of the app. Here's a breakdown of the estimated costs:

1. Features: The cost of developing an app like Instacart depends on the features you want to include in your app. Basic features like registration, product catalog, search, and checkout can cost around $10,000-$15,000. Advanced features like real-time order tracking, push notifications and chat support can cost around $20,000-$30,000.

2. Platform: The cost of developing an app also depends on the platform you choose. Developing an app for a single platform like Android or iOS can cost around $15,000-$25,000. Developing an app for both platforms can cost around $35,000-$50,000.

3. Location: The cost of developing an app also depends on the location of your development team. Hiring a development team from countries like India, Ukraine, and Indonesia can cost around $20-$50 per hour. Hiring a development team from the USA or the UK can cost around $100-$250 per hour.

4. Complexity: The complexity of the app can also impact the development cost. A simple grocery delivery app can cost around $10,000-$20,000. A complex app with advanced features can cost around $50,000-$100,000.

Considering all these factors, the estimated cost of developing a grocery delivery app like Instacart can range from $15,000 to $100,000 or even more. However, the final cost will depend on your specific requirements and the development team you choose.