A lightweight custom browser tool for your daily workflow: a calculator, planner, checklist or campaign link utility. Includes one responsive HTML/CSS/JavaScript page, editable source files, a usage guide and one revision within the agreed scope. Fixed starter price: $40. Delivery: 5 business days after receiving the complete brief. Hosting, backend, user accounts, payment processing and external APIs are excluded. Share your inputs, formulas, desired output and brand style before ordering. Independent demo tools are concept projects, not paid client case studies.