allcaltools is a free calculator library built around one gap most calculator sites ignore: number formats. Every finance calculator defaults to ₹ with Lakh/Crore grouping for Indian users, or $ with Thousand/Million grouping for everyone else — one tap to switch, and it's remembered. What's inside: 💰 Finance,🎓 Education ,🏗️ Construction QR code generator, UPI QR generator, Image-to-WebP converter Everything runs client-side No account, no email wall, no ads interrupting the calculator.