Based on customer preference it would be vital to make available the use of maps for easy access for both the customer and the courier, It would also be god to make available spaces for both courier and customer feedback during a delivery.

Time and food cost you have to write at what can a customer have to wait for the delivery to reach him or her also you have to write the cost of the food so a costumer will have to choose either to buy it or not

Here are some of the key features that are important to have in a food delivery app:

Easy order placement and tracking: Allow customers to easily browse menus, customize orders, and track the status of their delivery in real-time.

Payment integration: seamlessly integrate secure payment gateways like Stripe or PayPal into the checkout flow. Offer multiple payment options.

Location services: Use GPS to identify the customer's location for proximity-based restaurant suggestions. Provide accurate delivery ETAs based on locations.

Push notifications: Send important alerts to customers about order confirmations, driver assigned, order picked up and delivered, etc.

Ratings and reviews: Allow customers to rate and review restaurants and drivers. This drives quality and satisfaction.

Promotions and deals: Offer coupons, discounts, and promotional offers to engage customers. Integrate loyalty programs.

Analytics and reporting: gain insights into key metrics like most popular dishes, busiest days, repeat customers, etc. to inform business decisions.

Driver app: Provide an app for drivers to manage assigned deliveries, directions, and customer information.

Customer support: Set up self-help options and live chat/call support to handle customer issues promptly.

I hope this gives you a good overview of must-have features in a food delivery app! Let me know if you need any clarification or have additional questions.