WiserFool is the studio of Khanjan Kavani — architect turned software builder. Free tools you can use today, custom software built for your business, and a blog that makes the useful stuff make sense.
20 fast calculators and utilities — EMI, SIP, GST, income tax, invoice generator, QR codes and more. No sign-up, nothing stored, built for Indian users.
Open the toolsBusiness web tools, Android apps and websites — built around exactly how you work, shipped in weeks, and yours to keep. Clear packages from ₹15,000.
See the studioPlain-English guides on money, tax and running a small business in India — the kind of thing the free tools help you actually do. Written to be useful, not to fill space.
Read the blogTools, builds, and the occasional useful thought — shared as they happen on X.
Add it, remove it, split it into CGST and SGST — GST in plain numbers, at the current 2026 rates.
Why a bigger tenure feels cheaper but costs more, and how to see the real number before you sign.
An honest test for when a spreadsheet is fine — and the moment it starts costing you money.
From GST and invoices to QR codes — the free web tools that quietly save you hours.