Web application (laravel) / mobile (android) with push notifications - 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:

This application is very simple. Ideal for a serious, responsible and fast person in his work.

Required:
- A simple backend in Laravel 8, with AdminLTE 3, user login and a form with 3 or 4 fields (one of them will be a URL link).
- A mobile application on Android (apk) that when installed, the user "chooses" the channel where he will receive push notifications and when clicking on it, redirects to the URL link loaded in the form, (these "channels" will be loaded by the administrator in the web app and will be chosen at the time of submitting the form). Then the user can open the mobile app with the list of notifications and select the available channels. (Very simple)
- Diagram of joint operation.
- Source code of everything (web app and android). It must be clear, verbose and not have unnecessary code.

Delivered:
- SSH access in a VPS with web server installed for the web application.
- Access to google team (as developer) where firebase is configured for push notifications.

Budget, time and conditions:
- Final USD 150 including Freelancer commission.
- 7 days in a row.
- IMPORTANT: the first payment of 50% will be made when presenting the mobile app working, if everything is fine, 50% is released when the source code has been delivered and tested.

Applicants:
- With portfolio.
- Of course, be professional on Laravel and Android.

Estimating assumptions and context:
The scenario is based on a Freelancer listing from 2021-06-19 (historical project ID 30593104). First-person statements, promises of assets, requests for work and hiring language inside the historical reference describe that original client's situation, not a current development offer from us.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 100–150 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.