Finance, beautifully simple.
We were tired of calculators that were slow, ad-filled and creepy. So we built the ones we wanted to use: fast, beautiful, and private — every number stays on your device.
Private by design
Sliders write to the URL and localStorage only. We never see your salary, SIP or loan. Share a link and the other person sees your exact inputs — because they’re in the link.
Instant & honest
Every keystroke redraws the chart and table — no “Calculate” button. We show both nominal and real (inflation-adjusted) so you see purchasing power, not just a big number.
Built for decisions
Not just numbers — verdicts. FIRE date, years until $1M, fee drag in lakhs, sustainable vs depletes. Context that helps you act.
Why we built it
Most finance sites are slow, cover the page in trackers, and hide the formula. We wanted the opposite: a site that feels like a well-designed app — mesh gradients, glass cards, live charts — but respects your privacy and explains the math. So we designed 21 calculators that share one design system (inputs on the right, results on the left, sticky on desktop) and one promise: your data never leaves your device.
We use standard textbook formulas — SIP FV = PMT×[((1+r)^n−1)/r], compound A = P(1+r/n)^(nt), EMI P·r(1+r)^n/((1+r)^n−1) — and we show them in each guide so you can audit us. For the Historical Backtest we use real yearly returns from Nifty, Sensex, S&P 500, Gold, Nikkei, FTSE, DAX and MSCI World (1970→present) plus daily closes auto-updated at 16:00 IST.
How we make it (and how to help)
The site is static Astro with Tailwind and Chart.js, hosted on the edge. No database, no login, no paywall. If you find it useful, the best help is free: share a URL, link to us, or star the repo.
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