Price Comparing Android App Modification

Source code will be my property. We have developed an Android app for eCommerce with features of price compare from others and demand a new price from company by buyers. You will have to modify that previous app. Reference app, I'll show you and you can take idea from there. It will be a multiseller application, where sellers can create their account and post their mobile handsets to sell. Login should be done by OTP authentication in Seller or buyer app. And they can change their product price at anytime on buyer demand. Seller should be having the feature to approve the customer price or reject or modify or give a new price. There should be star rating and review feature below every product (Feedback or reviews can be removed only by customer and admin only), Sold by Seller name, Distance on map from user's current location, alongwith Buy Now and add to cart buttons. There will be Two Apps Customer Panel Merchant Panel (Admin Should be having all the features to monitor any account or edit or modify any account, total sales in last some days or months or years, total discounts given etc. Seller Panel (Return or refund price, Chat with customers) Buyer Panel (Share any products on social media and mails also or other apps also, demand new price from sellers, rating and reviews) Logo should be beautiful. Database should be faster in firebase. App should be lightest and fastest and should work in all Android Models. All the images should be of same size and should open instantly. We want to add price comparing features in our Android eCommerce App. Open [login to view URL] and see the url submission box its as simple as a contact form. Where user fill their details and it comes to our registered mail i.d It shud be quick form and There should be these fields in the form. Email I.d (Mendatory) Mobile Number (Mendatory) Pincode Location (Mendatory) Countdown Timer (Mendatory) OTP (Mendatory) All these fields should work only when a valid url is submitted. First Open [login to view URL] and see the url submission box and select category option with it. After that open [login to view URL] on next tab and search any refrigerator over there and copy open any refrigerator link and copy that url and paste that url in [login to view URL] and select refrigerator category over there first. Then click on demand price. Then a form will come and fill the details over there and enter my mobile number. It will send an otp and when we will enter that Otp then it will start the timer. We want to give this facility to users to search any electronics products on any other eCommerce marketplace and copy that url from [login to view URL] and paste it in our Url submission box and then demand new price. After submission url and click on demand price an otp will be sent and after entering otp, a countdown timer will be begin. You will have to give my email i.d in the code so that all the filled details come to my mail i.d when any customer visits the app and fill the details. Thats it. Its very simple. You will have to integrate it in our eCommerce Android App. Suppose you are a customer on our app. You want to buy any mobile phone, you will survey online and get the best price and then you will have to copy that link and post in our app and submit, then that link will come to us and we will give lesser price than that link sent to us by user and delivery within 120 minutes. From there, user will directly Add to cart that product and will Buy now to make the online payment (No COD). After user making the payment, a confirmation msg, email and push notification should go to customer, seller, admin etc. Admin then will assign a delivery boy and user will be intimated by push notification that this name delivery boy with this mobile number and AWB number has been assigned. After delivery boy pickup the product and delivery of the product, again one push notification will go to user's app, seller, admin that product has been picked up and on its way. For showing 120 minutes, A countdown timer should begin in some popup and if user want to hide that countdown popup they could hide, if they want to see it, they can enable it. Before countdown timer ends, product will reach customer. If customer want to go that shop then we will its location will be shown on google map everytime. Under every mobile phone listed, there should be google map location and its distance from that customer's location should be visible On google map. App should work only in Delhi between 110001-110099 pincodes.