Small tools and app demos.
Alongside websites, I can build simple app-style features such as calculators, booking flows, quote tools, task boards and small dashboards. These are useful when a business needs more than a static page.
What this shows
This page proves nathm.net is not only basic website pages. It includes real working mini apps that can be adapted for small businesses, portfolios, SEO planning, launch checks or internal tools.
- Working calculator logic
- Quote and invoice tools
- Booking and enquiry flows
- Local storage dashboard demo
- Branding and design helpers
- SEO and launch planning tools
Useful features that make a site feel custom.
A small business website can include tools that save time, answer common questions and make enquiries clearer.
Live app demos
Each example is a separate working HTML5 and JavaScript page. They are intentionally simple so they can be understood, edited and reused for real client projects.
Calculator
A real working calculator with keyboard support and safe expression parsing.
Open calculatorQuote estimator
A guided estimate tool for websites, trades, packages or service pricing.
Open estimatorBooking planner
A simple request flow for salons, trainers, photographers and local services.
Open plannerInvoice maker
A small estimate builder with line items, VAT toggle, totals and print support.
Open invoice makerTask board
A mini client board that saves tasks in the browser using local storage.
Open task boardPalette generator
A colour helper for quick brand shades and simple style guide ideas.
Open palette toolSEO checker
A simple tool for checking page titles, descriptions, H1s, phrases and URL slugs.
Open SEO checkerLaunch checklist
A browser-saved checklist for final website checks before publishing.
Open checklistContent planner
A small helper that turns rough business details into a homepage content outline.
Open planner