RealBill — GST bills & finance tools (India)

RealBill is a free, India-focused web product: create GST invoices, quotations, rent receipts, fuel bills, driver salary slips, restaurant bills, donation receipts, and salary slips without signing up, then download PDFs instantly. Alongside billing, the site hosts a broad calculators hub — SIP, EMI, FD, RD, PPF, gratuity, EPF/PF, NPS, income tax, HRA, and more — plus GST rate references and blog content. The screenshots show the SIP calculator page as a representative slice of that ecosystem: same global navigation, shared design language, and cross-links between tools. My work spans calculator UX, honest maths and disclaimer copy, and responsive layouts that stay usable on low-end phones.

• Document tools: GST invoices, quotations, rent and fuel receipts, restaurant and driver-salary formats, donation receipts, salary slips — structured forms and instant PDF output without forced accounts.
• Finance calculators: SIP, EMI, FD, PPF, gratuity, EPF/PF, NPS, income tax, HRA, and related pages so users can plan taxes, loans, retirement, and savings in one place.
• SIP experience (shown in the captures): monthly amount, expected return, and tenure with end-of-month future-value logic; prominent “not guaranteed” messaging next to headline results.
• Trust & discovery: formula explanations, worked examples, FAQs, and links between calculators; layout stays readable on mobile with tappable controls and clear hierarchy.

Calculators inside RealBill

The page sits inside the full RealBill shell: logo, primary nav (Home, Tools, Calculators, GST rates, About, Blog, Contact), language toggle, and a dense strip of calculator shortcuts (gratuity, PPF, EMI, FD, NPS, income tax, HRA, etc.). SIP is one entry in that network — inputs and sliders live next to one-click jumps to sibling tools so visitors can reconcile EMI vs SIP or tax vs savings in the same session.

SIP results & disclaimers

Results mirror how the rest of RealBill treats sensitive numbers: total invested, estimated returns, and maturity in ₹, immediately followed by copy that returns are illustrative and not advice. That pattern matches the product’s legal stance on generated bills too — clear limits on what the software promises.

Same product, small screen

Mobile inherits the full site chrome and calculator ecosystem — not a stripped “lite” page — so someone who starts on SIP can still reach invoices or EMI tools without friction.

On phones the global header collapses sensibly while the calculator body stays a single column: amounts and disclaimers remain legible, which matters for users who land from search on a commute and still need the same billing and calculator depth as desktop.