You will get a custom lead-generation calculator for your website, built and documented
Project details
I build interactive calculators that run in the browser: retirement projections, insurance gap tools, pricing and break-even calculators, ROI and cost estimators, and lead-generation tools that start a conversation instead of ending one.
Every one is a single self-contained file. No framework, no build step, no dependencies - so it embeds anywhere, loads instantly on a phone, and does not break when your site platform updates. The page stays fast, which matters when the calculator is the reason people landed on it.
What separates a working calculator from a broken one is not the interface, it is the edge cases. When a savings rate reaches 100%, a naive formula divides by zero and prints "Infinity". A fee of 100% does the same. I write the spec and the test cases before the code, run the tool against them, and hand you both documents - so maintaining it later does not depend on me.
The five images here are live tools, not mockups. Message me and I will send the links so you can open one and change a number yourself before buying.
Send me the formula, the spreadsheet you use today, or just what you want your visitor to find out. I will tell you what it takes before you pay.
Every one is a single self-contained file. No framework, no build step, no dependencies - so it embeds anywhere, loads instantly on a phone, and does not break when your site platform updates. The page stays fast, which matters when the calculator is the reason people landed on it.
What separates a working calculator from a broken one is not the interface, it is the edge cases. When a savings rate reaches 100%, a naive formula divides by zero and prints "Infinity". A fee of 100% does the same. I write the spec and the test cases before the code, run the tool against them, and hand you both documents - so maintaining it later does not depend on me.
The five images here are live tools, not mockups. Message me and I will send the links so you can open one and change a number yourself before buying.
Send me the formula, the spreadsheet you use today, or just what you want your visitor to find out. I will tell you what it takes before you pay.
What's included
| Service Tiers |
Starter
$450
|
Standard
$850
|
Advanced
$1,500
|
|---|---|---|---|
| Delivery Time | 4 days | 6 days | 10 days |
Number of Revisions | 0 | 0 | 0 |
Number of Pages | 1 | 1 | 3 |
Design Customization | - | ||
Content Upload | - | - | |
Responsive Design | |||
Source Code |
Frequently asked questions
About Hamza
Interactive Calculators, Dashboards & Financial Models (Web + Excel)
Bursa, Turkey - 11:56 pm local time
financial models that run in the browser as a single file.
They cover break-even and pricing, financial projections, insurance and retirement
models, inventory and invoice tracking. Every one of them is live, not a screenshot.
I also build small business systems end to end. Six of them are running publicly at
— progress billing for construction, insurance certificate tracking,
certified payroll, lot traceability, retail deduction recovery and digital product
delivery. Each one is a finished product, not a portfolio piece.
How I work: fixed price agreed before I start, a working version you can open in
your browser, and the source file handed to you at the end. Nothing to subscribe to,
nothing that stops working if I disappear.
Tell me what the tool needs to calculate and I will send a price and a date.
Steps for completing your project
After purchasing the project, send requirements so Hamza can start the project.
Delivery time starts when Hamza receives requirements from you.
Hamza works on your project following the steps below.
Revisions may occur after the delivery date.
The spec, before any code
One row per input and output, the formula in plain algebra, the rounding rule, and what happens at every edge case. You approve this before I build anything.
Build
A single embeddable file - no framework, no build step, no dependencies. Mobile and desktop, and it keeps working after your site platform updates.