Food delivery app for a local cafe

We run a small cafe in the city centre and want a mobile app that lets our regular guests order food for delivery without calling us. Right now orders come through phone calls and messengers, which is slow at lunchtime and leads to mistakes with addresses and missing items. We need a clean, friendly app for both major mobile platforms where a customer can browse the menu, add dishes to the cart, pay, and watch the order move from the kitchen to their door.

The menu should be organised by categories with photos, prices, descriptions and simple options such as size, extra sauces or removing an ingredient. The cart must recalculate the total, apply a promo code and show delivery cost and estimated time before checkout. Payment should work through a card and, ideally, a saved card for repeat orders, while keeping our option to pay in cash on delivery. After the order is placed, the customer follows its status in real time and receives push notifications when it is accepted, being cooked, out for delivery and arrived.

On our side we need a simple screen to accept orders, mark stages and hide dishes that ran out. Please tell us about apps you have shipped to the stores, how you handle payment and personal data safely, and how long a first working version would take. Source code, a short guide for our staff and help with the store publication are part of the job.