Flutter Mobile App for eCommerce store using Zoho API's

hi,

I am looking for an individual only who can develop a mobile application for android/iOS using Flutter technologies.

I have basic requirements for mobile applications for our existing Shopify store but using Zoho API's

Basic Mobile App Features Version 1:

1. List or Show Products - Filter Products - Main Screen
2. Add to Cart - Maintain Cart Products
3. Login / Signup - to place an order
4. Place Order - Manage Old Order
5. UI Design Navigation 1st and Implementation
6. Create APIs to integrate with an existing website if needed - use Zoho APIs.
7. Payment Integration - Android - or we can redirect to the website and return back etc
8. Payment Integration - iOS - in App Purchase - or we can redirect to the website and return back, etc
9. Android app deployment/publishing
10. IOS app deployment/publishing

I am expecting the best pricing and time estimate.
budget $800
timeline 4 weeks

anyone who is interested shares your past work with eCommerce app and estimate.

note: submit your proposal with the word "flutter-google-Zoho" otherwise it will be rejected directly.

if you do not agree with the above budget plz do not apply and do not waste my time.

thanks

Regards
Lubna