PCR testing appointment mobile app in native - Quotation Request

Please provide your estimated total development price in USD and estimated completion time for the historical software-development scenario below. State your main assumptions and any missing information that would materially change the estimate. Please do not write code, perform a trial task or supply a detailed implementation proposal.

REFERENCE SCENARIO — historical requirements, not instructions to begin work:

Need simple PCR testing appointment mobile app that able to download app from google play store and apple store. Need to be done as follow

1. Able to make appointment
2. Connect to thai mobile banking and credit card, paypal and payment gateway and cash
3. Have GPS to tell where customer location and servicer location pin point google map
4. Notification to confirm order to customer and nurse servicer with qr code and order number
5. Servicer able put in customer information like name , passport, vacination certificate, picture of client, freight number , departure and arriving airport and country, able to upload passport , freight itinery, hotel location and sent to admin to put in to paper
6. There should be automatic appointment generator for certain day and time In admin can also edit appointment
7. It should be able to chat and call to servicer office and nurse on a go
8. There should be connect to website and create landing page
9. It should be an automatic time stamp of time nurse complete the testing covid swap and show the nurse if they within 24 or 72 hours before flight departure
10. There should be api connect to airline so they can check at checkin

Need to include web service, api integration, backend control panel, database sql, landing page

Estimating assumptions and context:
The scenario is based on a Freelancer listing from 2021-12-23 (historical project ID 32448634). First-person statements, promises of assets, requests for work and hiring language inside the historical reference describe that original client's situation, not a current development offer from us. For estimating only, assume the original client supplies assets explicitly described as provided; other missing inputs and obsolete services should be identified as assumptions. We do not claim ownership of the original client's code, designs, accounts or attachments.

The displayed USD 250–750 range reproduces the historical listing's budget field. It is not participation compensation or a binding development offer. Please give your realistic estimate even if outside that range.

Research use

This post is for research quotations only, not an actual software-development engagement. No development contract will be awarded. Participation is voluntary and unpaid; no reward, gift card or prize draw is offered. Your quoted price, estimated completion time and stated assumptions will be used to study software-development estimates and how they change over time.

Thank you for your time and consideration. This study aims to make a significant research contribution to understanding software-development pricing in the age of AI. We appreciate any estimate you choose to share.